Custom Tab Control - OnPaint vs MessageBox - Problem

[warp123]

Hi I will explain my problem,

I got a MDI parent form that contains many child forms. For each child form I'm trying to display a messagebox(with .show).

The issue here is that the messagebox appears over the child form, like it's supposed to, but then the child form reprints itself over the messagebox therefor hiding it. The message box still has the focus so if I press F10 it'll bring it back to the foreground.

Is there a way keep the messagebox in the foreground to begin with?

The tabcontrol I'm using come from this site : http://www.codeproject.com/Articles/...Second-Edition

[dday9]

I'm not at a computer to check it, but there is the suspendlayout method which seems like it would work in this situation, just when the messagebox closes be sure to call resumelayout. That may not be the proper way, but I believe it would work for you in this case.

[warp123]

it's dont change anything if i suspendLayout all my childForm.

[dunfiddlin]

Forgive me if I'm being dim but what does "a MDI parent form that contains many child forms" have to do with a custom tab control?

[warp123]

Sorry i have forgot to explain the tabControl.

Each ChildForm got a TabControl. If i use the System.Windows.Forms.TabControl i dont have this bug because the TabControl dont reprints itself over the messagebox.

[dunfiddlin]

Ah, right. That makes it kinda tricky then since the fault is clearly the way the paint events are handled in the Tab control and it may not be possible to bypass that. Do these message boxes require a response or could they be built into the forms as text areas or as status messages? That's the only way off the top of my head that you can easily overcome the problem with certainty.

[warp123]

these message box require a response , i know i can make a custom MessageBox but i dont really want that if i can bypass the bug.

[warp123]

I try your MessageBoxEx, but the MessageBox never come on the top because all the TabControl reprints itself over the messagebox. I have try with BreakPoint and when the MessageBox show all the TabControl behind reprints.

[Edgemeal]

I try your MessageBoxEx, but the MessageBox never come on the top because all the TabControl reprints itself over the messagebox. I have try with BreakPoint and when the MessageBox show all the TabControl behind reprints.

That is really weird, Nothing should draw over a TopMost window except another TopMost window that is activated.
I looked at the source code real quick and compiled it for FW 4.0, but only tried it real quick on a single form project (in Win7) and seemed to act OK.

Can you post the source code for a simple project reproducing how the control fails?

[warp123]

I have make a makup for this bug. but i dont know why i cant attach my project.zip.

I will post all my code class.

Form1 :

Public Class Form1
    Friend WithEvents TabControl1 As CustomTabControl
    Friend WithEvents TabPage1 As System.Windows.Forms.TabPage
    Friend WithEvents TabPage2 As System.Windows.Forms.TabPage
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Public Sub New()
        ' The Windows Forms Designer requires the following call.
        InitializeComponent()
        InitializeForm()
    End Sub

    Private Sub Form1_FormClosing(sender As Object, e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
        Dim res = MessageBoxEx("Save data before exit?", "MyApp - Save?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question)
        If res = Windows.Forms.DialogResult.Cancel Then
            e.Cancel = True
        ElseIf res = Windows.Forms.DialogResult.Yes Then
            ' < add code here for Yes >
        End If
    End Sub

    Private Sub InitializeForm()
        Me.TabControl1 = New System.Windows.Forms.CustomTabControl()
        Me.TabPage1 = New System.Windows.Forms.TabPage()
        Me.TabPage2 = New System.Windows.Forms.TabPage()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.TabControl1.SuspendLayout()
        Me.TabPage1.SuspendLayout()
        Me.SuspendLayout()
        '
        'TabControl1
        '
        Me.TabControl1.Controls.Add(Me.TabPage1)
        Me.TabControl1.Controls.Add(Me.TabPage2)
        '

        Me.TabControl1.DisplayStyleProvider.BorderColor = System.Drawing.SystemColors.ControlDark
        Me.TabControl1.DisplayStyleProvider.BorderColorHot = System.Drawing.SystemColors.ControlDark
        Me.TabControl1.DisplayStyleProvider.BorderColorSelected = System.Drawing.Color.FromArgb(CType(CType(132, Byte), Integer), CType(CType(130, Byte), Integer), CType(CType(132, Byte), Integer))
        Me.TabControl1.DisplayStyleProvider.CloserColor = System.Drawing.Color.DarkGray
        Me.TabControl1.DisplayStyleProvider.FocusTrack = True
        Me.TabControl1.DisplayStyleProvider.HotTrack = True
        Me.TabControl1.DisplayStyleProvider.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft
        Me.TabControl1.DisplayStyleProvider.Opacity = 1.0!
        Me.TabControl1.DisplayStyleProvider.Overlap = 0
        Me.TabControl1.DisplayStyleProvider.Padding = New System.Drawing.Point(6, 3)
        Me.TabControl1.DisplayStyleProvider.Radius = 2
        Me.TabControl1.DisplayStyleProvider.ShowTabCloser = False
        Me.TabControl1.DisplayStyleProvider.TextColor = System.Drawing.SystemColors.ControlText
        Me.TabControl1.DisplayStyleProvider.TextColorDisabled = System.Drawing.SystemColors.ControlDark
        Me.TabControl1.DisplayStyleProvider.TextColorSelected = System.Drawing.SystemColors.ControlText
        Me.TabControl1.HotTrack = True
        Me.TabControl1.Location = New System.Drawing.Point(30, 12)
        Me.TabControl1.Name = "TabControl1"
        Me.TabControl1.SelectedIndex = 0
        Me.TabControl1.Size = New System.Drawing.Size(543, 413)
        Me.TabControl1.TabIndex = 0
        '
        'TabPage1
        '
        Me.TabPage1.Controls.Add(Me.Label1)
        Me.TabPage1.Location = New System.Drawing.Point(4, 23)
        Me.TabPage1.Name = "TabPage1"
        Me.TabPage1.Padding = New System.Windows.Forms.Padding(3)
        Me.TabPage1.Size = New System.Drawing.Size(535, 386)
        Me.TabPage1.TabIndex = 0
        Me.TabPage1.Text = "TabPage1"
        Me.TabPage1.UseVisualStyleBackColor = True
        '
        'TabPage2
        '
        Me.TabPage2.Location = New System.Drawing.Point(4, 23)
        Me.TabPage2.Name = "TabPage2"
        Me.TabPage2.Padding = New System.Windows.Forms.Padding(3)
        Me.TabPage2.Size = New System.Drawing.Size(535, 386)
        Me.TabPage2.TabIndex = 1
        Me.TabPage2.Text = "TabPage2"
        Me.TabPage2.UseVisualStyleBackColor = True
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Font = New System.Drawing.Font("Microsoft Sans Serif", 20.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label1.Location = New System.Drawing.Point(205, 141)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(107, 31)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Hello !!!"
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(596, 437)
        Me.Controls.Add(Me.TabControl1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.TabControl1.ResumeLayout(False)
        Me.TabPage1.ResumeLayout(False)
        Me.TabPage1.PerformLayout()
        Me.ResumeLayout(False)

    End Sub

End Class

[warp123]

MDIPARENT :

I have split this code in 3 because this class is too long.

Imports System.Windows.Forms

Public Class MDIParent

    Private Sub ShowNewForm(ByVal sender As Object, ByVal e As EventArgs) Handles NewToolStripMenuItem.Click, NewToolStripButton.Click, NewWindowToolStripMenuItem.Click
        ' Créez une nouvelle instance du formulaire enfant.
        Dim ChildForm As New Form1
        ' Configurez-la en tant qu'enfant de ce formulaire MDI avant de l'afficher.
        ChildForm.MdiParent = Me

        m_ChildFormNumber += 1
        ChildForm.Text = "Fenêtre " & m_ChildFormNumber

        ChildForm.Show()
    End Sub

    Private Sub OpenFile(ByVal sender As Object, ByVal e As EventArgs) Handles OpenToolStripMenuItem.Click, OpenToolStripButton.Click
        Dim OpenFileDialog As New OpenFileDialog
        OpenFileDialog.InitialDirectory = My.Computer.FileSystem.SpecialDirectories.MyDocuments
        OpenFileDialog.Filter = "Fichiers texte (*.txt)|*.txt|Tous les fichiers (*.*)|*.*"
        If (OpenFileDialog.ShowDialog(Me) = System.Windows.Forms.DialogResult.OK) Then
            Dim FileName As String = OpenFileDialog.FileName
            ' TODO: ajoutez le code ici pour ouvrir le fichier.
        End If
    End Sub

    Private Sub SaveAsToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles SaveAsToolStripMenuItem.Click
        Dim SaveFileDialog As New SaveFileDialog
        SaveFileDialog.InitialDirectory = My.Computer.FileSystem.SpecialDirectories.MyDocuments
        SaveFileDialog.Filter = "Fichiers texte (*.txt)|*.txt|Tous les fichiers (*.*)|*.*" 

        If (SaveFileDialog.ShowDialog(Me) = System.Windows.Forms.DialogResult.OK) Then
            Dim FileName As String = SaveFileDialog.FileName
            ' TODO: ajoutez le code ici pour enregistrer le contenu actuel du formulaire dans un fichier.
        End If
    End Sub


    Private Sub ExitToolsStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ExitToolStripMenuItem.Click
        Me.Close()
    End Sub

    Private Sub CutToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles CutToolStripMenuItem.Click
        ' Utilisez My.Computer.Clipboard pour insérer les images ou le texte sélectionné dans le Presse-papiers
    End Sub

    Private Sub CopyToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles CopyToolStripMenuItem.Click
        ' Utilisez My.Computer.Clipboard pour insérer les images ou le texte sélectionné dans le Presse-papiers
    End Sub

    Private Sub PasteToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles PasteToolStripMenuItem.Click
        'Utilisez My.Computer.Clipboard.GetText() ou My.Computer.Clipboard.GetData pour extraire les informations du Presse-papiers.
    End Sub

    Private Sub ToolBarToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ToolBarToolStripMenuItem.Click
        Me.ToolStrip.Visible = Me.ToolBarToolStripMenuItem.Checked
    End Sub

    Private Sub StatusBarToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles StatusBarToolStripMenuItem.Click
        Me.StatusStrip.Visible = Me.StatusBarToolStripMenuItem.Checked
    End Sub

    Private Sub CascadeToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles CascadeToolStripMenuItem.Click
        Me.LayoutMdi(MdiLayout.Cascade)
    End Sub

    Private Sub TileVerticalToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles TileVerticalToolStripMenuItem.Click
        Me.LayoutMdi(MdiLayout.TileVertical)
    End Sub

    Private Sub TileHorizontalToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles TileHorizontalToolStripMenuItem.Click
        Me.LayoutMdi(MdiLayout.TileHorizontal)
    End Sub

    Private Sub ArrangeIconsToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ArrangeIconsToolStripMenuItem.Click
        Me.LayoutMdi(MdiLayout.ArrangeIcons)
    End Sub

    Private Sub CloseAllToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles CloseAllToolStripMenuItem.Click
        ' Fermez tous les formulaires enfants du parent.
        For Each ChildForm As Form In Me.MdiChildren
            ChildForm.Close()
        Next
    End Sub

    Private m_ChildFormNumber As Integer
    Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container
        Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(MDIParent))
        Me.MenuStrip = New System.Windows.Forms.MenuStrip
        Me.ToolStrip = New System.Windows.Forms.ToolStrip
        Me.StatusStrip = New System.Windows.Forms.StatusStrip
        Me.ContentsToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.HelpMenu = New System.Windows.Forms.ToolStripMenuItem
        Me.IndexToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.SearchToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.ToolStripSeparator8 = New System.Windows.Forms.ToolStripSeparator
        Me.AboutToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.ArrangeIconsToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.CloseAllToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.NewWindowToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.WindowsMenu = New System.Windows.Forms.ToolStripMenuItem
        Me.CascadeToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.TileVerticalToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.TileHorizontalToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.OptionsToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.HelpToolStripButton = New System.Windows.Forms.ToolStripButton
        Me.ToolStripSeparator2 = New System.Windows.Forms.ToolStripSeparator
        Me.PrintPreviewToolStripButton = New System.Windows.Forms.ToolStripButton
        Me.ToolTip = New System.Windows.Forms.ToolTip(Me.components)
        Me.ToolStripStatusLabel = New System.Windows.Forms.ToolStripStatusLabel
        Me.PrintToolStripButton = New System.Windows.Forms.ToolStripButton
        Me.NewToolStripButton = New System.Windows.Forms.ToolStripButton
        Me.OpenToolStripButton = New System.Windows.Forms.ToolStripButton
        Me.SaveToolStripButton = New System.Windows.Forms.ToolStripButton
        Me.ToolStripSeparator1 = New System.Windows.Forms.ToolStripSeparator
        Me.PrintPreviewToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.PrintToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.ToolStripSeparator4 = New System.Windows.Forms.ToolStripSeparator
        Me.ExitToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.ToolStripSeparator5 = New System.Windows.Forms.ToolStripSeparator
        Me.PrintSetupToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.SaveAsToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.NewToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.FileMenu = New System.Windows.Forms.ToolStripMenuItem
        Me.OpenToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.ToolStripSeparator3 = New System.Windows.Forms.ToolStripSeparator
        Me.SaveToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.EditMenu = New System.Windows.Forms.ToolStripMenuItem
        Me.UndoToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.RedoToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.ToolStripSeparator6 = New System.Windows.Forms.ToolStripSeparator
        Me.CutToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.CopyToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.PasteToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.ToolStripSeparator7 = New System.Windows.Forms.ToolStripSeparator
        Me.SelectAllToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.ViewMenu = New System.Windows.Forms.ToolStripMenuItem
        Me.ToolBarToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.StatusBarToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.ToolsMenu = New System.Windows.Forms.ToolStripMenuItem
        Me.StatusStrip.SuspendLayout()
        Me.ToolStrip.SuspendLayout()
        Me.MenuStrip.SuspendLayout()
        Me.SuspendLayout()
        '
        'ContentsToolStripMenuItem
        '
        Me.ContentsToolStripMenuItem.Name = "ContentsToolStripMenuItem"
        Me.ContentsToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.F1), System.Windows.Forms.Keys)
        Me.ContentsToolStripMenuItem.Text = "&Contenu"
        '
        'HelpMenu
        '
        Me.HelpMenu.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.ContentsToolStripMenuItem, Me.IndexToolStripMenuItem, Me.SearchToolStripMenuItem, Me.ToolStripSeparator8, Me.AboutToolStripMenuItem})
        Me.HelpMenu.Name = "HelpMenu"
        Me.HelpMenu.Text = "&?"
        '
        'IndexToolStripMenuItem
        '
        Me.IndexToolStripMenuItem.Image = CType(resources.GetObject("IndexToolStripMenuItem.Image"), System.Drawing.Image)
        Me.IndexToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.IndexToolStripMenuItem.Name = "IndexToolStripMenuItem"
        Me.IndexToolStripMenuItem.Text = "&Index"
        '
        'SearchToolStripMenuItem
        '
        Me.SearchToolStripMenuItem.Image = CType(resources.GetObject("SearchToolStripMenuItem.Image"), System.Drawing.Image)
        Me.SearchToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.SearchToolStripMenuItem.Name = "SearchToolStripMenuItem"
        Me.SearchToolStripMenuItem.Text = "&Rechercher"
        '
        'ToolStripSeparator8
        '
        Me.ToolStripSeparator8.Name = "ToolStripSeparator8"
        '
        'AboutToolStripMenuItem
        '
        Me.AboutToolStripMenuItem.Name = "AboutToolStripMenuItem"
        Me.AboutToolStripMenuItem.Text = "À pr&opos de..."
        '
        'ArrangeIconsToolStripMenuItem
        '
        Me.ArrangeIconsToolStripMenuItem.Name = "ArrangeIconsToolStripMenuItem"
        Me.ArrangeIconsToolStripMenuItem.Text = "&Réorganiser les icônes"
        '
        'CloseAllToolStripMenuItem
        '
        Me.CloseAllToolStripMenuItem.Name = "CloseAllToolStripMenuItem"
        Me.CloseAllToolStripMenuItem.Text = "&Fermer tout"
        '
        'NewWindowToolStripMenuItem
        '
        Me.NewWindowToolStripMenuItem.Name = "NewWindowToolStripMenuItem"
        Me.NewWindowToolStripMenuItem.Text = "&Nouvelle fenêtre"
        '
        'WindowsMenu
        '
        Me.WindowsMenu.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.NewWindowToolStripMenuItem, Me.CascadeToolStripMenuItem, Me.TileVerticalToolStripMenuItem, Me.TileHorizontalToolStripMenuItem, Me.CloseAllToolStripMenuItem, Me.ArrangeIconsToolStripMenuItem})
        Me.WindowsMenu.Name = "WindowsMenu"
        Me.WindowsMenu.Text = "F&enêtres"
        '
        'CascadeToolStripMenuItem
        '
        Me.CascadeToolStripMenuItem.Name = "CascadeToolStripMenuItem"
        Me.CascadeToolStripMenuItem.Text = "&Cascade"
        '
        'TileVerticalToolStripMenuItem
        '
        Me.TileVerticalToolStripMenuItem.Name = "TileVerticalToolStripMenuItem"
        Me.TileVerticalToolStripMenuItem.Text = "Mosaïque &verticale"
        '
        'TileHorizontalToolStripMenuItem
        '
        Me.TileHorizontalToolStripMenuItem.Name = "TileHorizontalToolStripMenuItem"
        Me.TileHorizontalToolStripMenuItem.Text = "Mosaïque &horizontale"
        '
        'OptionsToolStripMenuItem
        '
        Me.OptionsToolStripMenuItem.Name = "OptionsToolStripMenuItem"
        Me.OptionsToolStripMenuItem.Text = "&Options"
        '
        'HelpToolStripButton
        '
        Me.HelpToolStripButton.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.HelpToolStripButton.Image = CType(resources.GetObject("HelpToolStripButton.Image"), System.Drawing.Image)
        Me.HelpToolStripButton.ImageTransparentColor = System.Drawing.Color.Black
        Me.HelpToolStripButton.Name = "HelpToolStripButton"
        Me.HelpToolStripButton.Text = "Aide"
        '
        'ToolStripSeparator2
        '
        Me.ToolStripSeparator2.Name = "ToolStripSeparator2"
        '
        'PrintPreviewToolStripButton
        '
        Me.PrintPreviewToolStripButton.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.PrintPreviewToolStripButton.Image = CType(resources.GetObject("PrintPreviewToolStripButton.Image"), System.Drawing.Image)
        Me.PrintPreviewToolStripButton.ImageTransparentColor = System.Drawing.Color.Black
        Me.PrintPreviewToolStripButton.Name = "PrintPreviewToolStripButton"
        Me.PrintPreviewToolStripButton.Text = "Aperçu avant impression"
        '
        'ToolStripStatusLabel
        '
        Me.ToolStripStatusLabel.Name = "ToolStripStatusLabel"
        Me.ToolStripStatusLabel.Text = "État"
        '
        'StatusStrip
        '
        Me.StatusStrip.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.ToolStripStatusLabel})
        Me.StatusStrip.LayoutStyle = System.Windows.Forms.ToolStripLayoutStyle.Table
        Me.StatusStrip.Location = New System.Drawing.Point(0, 433)
        Me.StatusStrip.Name = "StatusStrip"
        Me.StatusStrip.Size = New System.Drawing.Size(632, 20)
        Me.StatusStrip.TabIndex = 7
        Me.StatusStrip.Text = "StatusStrip"
        '
        'PrintToolStripButton
        '
        Me.PrintToolStripButton.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.PrintToolStripButton.Image = CType(resources.GetObject("PrintToolStripButton.Image"), System.Drawing.Image)
        Me.PrintToolStripButton.ImageTransparentColor = System.Drawing.Color.Black
        Me.PrintToolStripButton.Name = "PrintToolStripButton"
        Me.PrintToolStripButton.Text = "Imprimer"

[warp123]

 '
        'ToolStripStatusLabel
        '
        Me.ToolStripStatusLabel.Name = "ToolStripStatusLabel"
        Me.ToolStripStatusLabel.Text = "État"
        '
        'StatusStrip
        '
        Me.StatusStrip.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.ToolStripStatusLabel})
        Me.StatusStrip.LayoutStyle = System.Windows.Forms.ToolStripLayoutStyle.Table
        Me.StatusStrip.Location = New System.Drawing.Point(0, 433)
        Me.StatusStrip.Name = "StatusStrip"
        Me.StatusStrip.Size = New System.Drawing.Size(632, 20)
        Me.StatusStrip.TabIndex = 7
        Me.StatusStrip.Text = "StatusStrip"
        '
        'PrintToolStripButton
        '
        Me.PrintToolStripButton.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.PrintToolStripButton.Image = CType(resources.GetObject("PrintToolStripButton.Image"), System.Drawing.Image)
        Me.PrintToolStripButton.ImageTransparentColor = System.Drawing.Color.Black
        Me.PrintToolStripButton.Name = "PrintToolStripButton"
        Me.PrintToolStripButton.Text = "Imprimer"
        '
        'NewToolStripButton
        '
        Me.NewToolStripButton.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.NewToolStripButton.Image = CType(resources.GetObject("NewToolStripButton.Image"), System.Drawing.Image)
        Me.NewToolStripButton.ImageTransparentColor = System.Drawing.Color.Black
        Me.NewToolStripButton.Name = "NewToolStripButton"
        Me.NewToolStripButton.Text = "Nouveau"
        '
        'ToolStrip
        '
        Me.ToolStrip.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.NewToolStripButton, Me.OpenToolStripButton, Me.SaveToolStripButton, Me.ToolStripSeparator1, Me.PrintToolStripButton, Me.PrintPreviewToolStripButton, Me.ToolStripSeparator2, Me.HelpToolStripButton})
        Me.ToolStrip.Location = New System.Drawing.Point(0, 24)
        Me.ToolStrip.Name = "ToolStrip"
        Me.ToolStrip.Size = New System.Drawing.Size(632, 25)
        Me.ToolStrip.TabIndex = 6
        Me.ToolStrip.Text = "ToolStrip"
        '
        'OpenToolStripButton
        '
        Me.OpenToolStripButton.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.OpenToolStripButton.Image = CType(resources.GetObject("OpenToolStripButton.Image"), System.Drawing.Image)
        Me.OpenToolStripButton.ImageTransparentColor = System.Drawing.Color.Black
        Me.OpenToolStripButton.Name = "OpenToolStripButton"
        Me.OpenToolStripButton.Text = "Ouvrir"
        '
        'SaveToolStripButton
        '
        Me.SaveToolStripButton.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.SaveToolStripButton.Image = CType(resources.GetObject("SaveToolStripButton.Image"), System.Drawing.Image)
        Me.SaveToolStripButton.ImageTransparentColor = System.Drawing.Color.Black
        Me.SaveToolStripButton.Name = "SaveToolStripButton"
        Me.SaveToolStripButton.Text = "Enregistrer"
        '
        'ToolStripSeparator1
        '
        Me.ToolStripSeparator1.Name = "ToolStripSeparator1"
        '
        'PrintPreviewToolStripMenuItem
        '
        Me.PrintPreviewToolStripMenuItem.Image = CType(resources.GetObject("PrintPreviewToolStripMenuItem.Image"), System.Drawing.Image)
        Me.PrintPreviewToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.PrintPreviewToolStripMenuItem.Name = "PrintPreviewToolStripMenuItem"
        Me.PrintPreviewToolStripMenuItem.Text = "Aperçu a&vant impression"
        '
        'PrintToolStripMenuItem
        '
        Me.PrintToolStripMenuItem.Image = CType(resources.GetObject("PrintToolStripMenuItem.Image"), System.Drawing.Image)
        Me.PrintToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.PrintToolStripMenuItem.Name = "PrintToolStripMenuItem"
        Me.PrintToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.P), System.Windows.Forms.Keys)
        Me.PrintToolStripMenuItem.Text = "&Imprimer"
        '
        'ToolStripSeparator4
        '
        Me.ToolStripSeparator4.Name = "ToolStripSeparator4"
        '
        'ExitToolStripMenuItem
        '
        Me.ExitToolStripMenuItem.Name = "ExitToolStripMenuItem"
        Me.ExitToolStripMenuItem.Text = "&Quitter"
        '
        'ToolStripSeparator5
        '
        Me.ToolStripSeparator5.Name = "ToolStripSeparator5"
        '
        'PrintSetupToolStripMenuItem
        '
        Me.PrintSetupToolStripMenuItem.Name = "PrintSetupToolStripMenuItem"
        Me.PrintSetupToolStripMenuItem.Text = "Configuration de l'impression"
        '
        'SaveAsToolStripMenuItem
        '
        Me.SaveAsToolStripMenuItem.Name = "SaveAsToolStripMenuItem"
        Me.SaveAsToolStripMenuItem.Text = "Enregistrer &sous"
        '
        'NewToolStripMenuItem
        '
        Me.NewToolStripMenuItem.Image = CType(resources.GetObject("NewToolStripMenuItem.Image"), System.Drawing.Image)
        Me.NewToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.NewToolStripMenuItem.Name = "NewToolStripMenuItem"
        Me.NewToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.N), System.Windows.Forms.Keys)
        Me.NewToolStripMenuItem.Text = "&Nouveau"
        '
        'FileMenu
        '
        Me.FileMenu.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.NewToolStripMenuItem, Me.OpenToolStripMenuItem, Me.ToolStripSeparator3, Me.SaveToolStripMenuItem, Me.SaveAsToolStripMenuItem, Me.ToolStripSeparator4, Me.PrintToolStripMenuItem, Me.PrintPreviewToolStripMenuItem, Me.PrintSetupToolStripMenuItem, Me.ToolStripSeparator5, Me.ExitToolStripMenuItem})
        Me.FileMenu.ImageTransparentColor = System.Drawing.SystemColors.ActiveBorder
        Me.FileMenu.Name = "FileMenu"
        Me.FileMenu.Text = "&Fichier"
        '
        'OpenToolStripMenuItem
        '
        Me.OpenToolStripMenuItem.Image = CType(resources.GetObject("OpenToolStripMenuItem.Image"), System.Drawing.Image)
        Me.OpenToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.OpenToolStripMenuItem.Name = "OpenToolStripMenuItem"
        Me.OpenToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.O), System.Windows.Forms.Keys)
        Me.OpenToolStripMenuItem.Text = "&Ouvrir"
        '
        'ToolStripSeparator3
        '
        Me.ToolStripSeparator3.Name = "ToolStripSeparator3"
        '
        'SaveToolStripMenuItem
        '
        Me.SaveToolStripMenuItem.Image = CType(resources.GetObject("SaveToolStripMenuItem.Image"), System.Drawing.Image)
        Me.SaveToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.SaveToolStripMenuItem.Name = "SaveToolStripMenuItem"
        Me.SaveToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.S), System.Windows.Forms.Keys)
        Me.SaveToolStripMenuItem.Text = "&Enregistrer"
        '
        'MenuStrip
        '
        Me.MenuStrip.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.FileMenu, Me.EditMenu, Me.ViewMenu, Me.ToolsMenu, Me.WindowsMenu, Me.HelpMenu})
        Me.MenuStrip.Location = New System.Drawing.Point(0, 0)
        Me.MenuStrip.MdiWindowListItem = Me.WindowsMenu
        Me.MenuStrip.Name = "MenuStrip"
        Me.MenuStrip.Size = New System.Drawing.Size(632, 24)
        Me.MenuStrip.TabIndex = 5
        Me.MenuStrip.Text = "MenuStrip"
        '
        'EditMenu
        '
        Me.EditMenu.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.UndoToolStripMenuItem, Me.RedoToolStripMenuItem, Me.ToolStripSeparator6, Me.CutToolStripMenuItem, Me.CopyToolStripMenuItem, Me.PasteToolStripMenuItem, Me.ToolStripSeparator7, Me.SelectAllToolStripMenuItem})
        Me.EditMenu.Name = "EditMenu"
        Me.EditMenu.Text = "&Edition"
        '
        'UndoToolStripMenuItem
        '
        Me.UndoToolStripMenuItem.Image = CType(resources.GetObject("UndoToolStripMenuItem.Image"), System.Drawing.Image)
        Me.UndoToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.UndoToolStripMenuItem.Name = "UndoToolStripMenuItem"
        Me.UndoToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.Z), System.Windows.Forms.Keys)
        Me.UndoToolStripMenuItem.Text = "&Annuler"
        '
        'RedoToolStripMenuItem
        '
        Me.RedoToolStripMenuItem.Image = CType(resources.GetObject("RedoToolStripMenuItem.Image"), System.Drawing.Image)
        Me.RedoToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.RedoToolStripMenuItem.Name = "RedoToolStripMenuItem"
        Me.RedoToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.Y), System.Windows.Forms.Keys)
        Me.RedoToolStripMenuItem.Text = "&Rétablir"
        '
        'ToolStripSeparator6
        '
        Me.ToolStripSeparator6.Name = "ToolStripSeparator6"
        '
        'CutToolStripMenuItem
        '
        Me.CutToolStripMenuItem.Image = CType(resources.GetObject("CutToolStripMenuItem.Image"), System.Drawing.Image)
        Me.CutToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.CutToolStripMenuItem.Name = "CutToolStripMenuItem"
        Me.CutToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.X), System.Windows.Forms.Keys)
        Me.CutToolStripMenuItem.Text = "Co&uper"
        '
        'CopyToolStripMenuItem
        '
        Me.CopyToolStripMenuItem.Image = CType(resources.GetObject("CopyToolStripMenuItem.Image"), System.Drawing.Image)
        Me.CopyToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.CopyToolStripMenuItem.Name = "CopyToolStripMenuItem"
        Me.CopyToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.C), System.Windows.Forms.Keys)
        Me.CopyToolStripMenuItem.Text = "&Copier"
        '
        'PasteToolStripMenuItem
        '
        Me.PasteToolStripMenuItem.Image = CType(resources.GetObject("PasteToolStripMenuItem.Image"), System.Drawing.Image)
        Me.PasteToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.Black
        Me.PasteToolStripMenuItem.Name = "PasteToolStripMenuItem"
        Me.PasteToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.V), System.Windows.Forms.Keys)
        Me.PasteToolStripMenuItem.Text = "&Coller"
        '
        'ToolStripSeparator7
        '
        Me.ToolStripSeparator7.Name = "ToolStripSeparator7"
        '
        'SelectAllToolStripMenuItem
        '
        Me.SelectAllToolStripMenuItem.Name = "SelectAllToolStripMenuItem"
        Me.SelectAllToolStripMenuItem.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.A), System.Windows.Forms.Keys)
        Me.SelectAllToolStripMenuItem.Text = "Sélectionner &tout"
        '
        'ViewMenu
        '
        Me.ViewMenu.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.ToolBarToolStripMenuItem, Me.StatusBarToolStripMenuItem})
        Me.ViewMenu.Name = "ViewMenu"
        Me.ViewMenu.Text = "&Affichage"
        '
        'ToolBarToolStripMenuItem
        '
        Me.ToolBarToolStripMenuItem.Checked = True
        Me.ToolBarToolStripMenuItem.CheckOnClick = True
        Me.ToolBarToolStripMenuItem.CheckState = System.Windows.Forms.CheckState.Checked
        Me.ToolBarToolStripMenuItem.Name = "ToolBarToolStripMenuItem"
        Me.ToolBarToolStripMenuItem.Text = "&Barre d'outils"
        '
        'StatusBarToolStripMenuItem
        '
        Me.StatusBarToolStripMenuItem.Checked = True
        Me.StatusBarToolStripMenuItem.CheckOnClick = True
        Me.StatusBarToolStripMenuItem.CheckState = System.Windows.Forms.CheckState.Checked
        Me.StatusBarToolStripMenuItem.Name = "StatusBarToolStripMenuItem"
        Me.StatusBarToolStripMenuItem.Text = "&Barre d'état"
        '
        'ToolsMenu
        '
        Me.ToolsMenu.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.OptionsToolStripMenuItem})
        Me.ToolsMenu.Name = "ToolsMenu"
        Me.ToolsMenu.Text = "&Outils"
        '
        'MDIParent
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(632, 453)
        Me.Controls.Add(Me.ToolStrip)
        Me.Controls.Add(Me.MenuStrip)
        Me.Controls.Add(Me.StatusStrip)
        Me.IsMdiContainer = True
        Me.MainMenuStrip = Me.MenuStrip
        Me.Name = "MDIParent"
        Me.Text = "MDIParent"
        Me.StatusStrip.ResumeLayout(False)
        Me.ToolStrip.ResumeLayout(False)
        Me.MenuStrip.ResumeLayout(False)
        Me.ResumeLayout(False)
        Me.PerformLayout()

    End Sub

[warp123]

Friend WithEvents ContentsToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents HelpMenu As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents IndexToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents SearchToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents ToolStripSeparator8 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents AboutToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents ArrangeIconsToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents CloseAllToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents NewWindowToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents WindowsMenu As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents CascadeToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents TileVerticalToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents TileHorizontalToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents OptionsToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents HelpToolStripButton As System.Windows.Forms.ToolStripButton
    Friend WithEvents ToolStripSeparator2 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents PrintPreviewToolStripButton As System.Windows.Forms.ToolStripButton
    Friend WithEvents ToolTip As System.Windows.Forms.ToolTip
    Friend WithEvents ToolStripStatusLabel As System.Windows.Forms.ToolStripStatusLabel
    Friend WithEvents StatusStrip As System.Windows.Forms.StatusStrip
    Friend WithEvents PrintToolStripButton As System.Windows.Forms.ToolStripButton
    Friend WithEvents NewToolStripButton As System.Windows.Forms.ToolStripButton
    Friend WithEvents ToolStrip As System.Windows.Forms.ToolStrip
    Friend WithEvents OpenToolStripButton As System.Windows.Forms.ToolStripButton
    Friend WithEvents SaveToolStripButton As System.Windows.Forms.ToolStripButton
    Friend WithEvents ToolStripSeparator1 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents PrintPreviewToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents PrintToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents ToolStripSeparator4 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents ExitToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents ToolStripSeparator5 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents PrintSetupToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents SaveAsToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents NewToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents FileMenu As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents OpenToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents ToolStripSeparator3 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents SaveToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents MenuStrip As System.Windows.Forms.MenuStrip
    Friend WithEvents EditMenu As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents UndoToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents RedoToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents ToolStripSeparator6 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents CutToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents CopyToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents PasteToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents ToolStripSeparator7 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents SelectAllToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents ViewMenu As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents ToolBarToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents StatusBarToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents ToolsMenu As System.Windows.Forms.ToolStripMenuItem
End Class

MsgBoxForeGround :

' Force MsgBox to ForeGround & TopMost v1.02
' A workaround for when msgbox hides behind other windows.
'
' Usage:
' 1) Add this module to your project.
' 2) Replace "MessageBox.Show" with "MessageBoxEx" where needed.

Imports System.Runtime.InteropServices
Module MsgBoxForeGround
    Private WithEvents msgTimer As New Timer
    Private msgCaption As String

    <DllImport("user32.dll", CharSet:=CharSet.Auto, SetLastError:=True)>
    Private Function SetForegroundWindow(ByVal hWnd As IntPtr) As Boolean
    End Function

    <DllImport("user32.dll", CharSet:=CharSet.Auto, EntryPoint:="FindWindow")> _
    Private Function FindWindow(ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
    End Function

    Private Const SWP_NOMOVE As UInteger = &H2
    Private Const SWP_NOSIZE As UInteger = &H1
    Private Const SWP_SHOWWINDOW As UInteger = &H40
    Private ReadOnly HWND_TOPMOST As New IntPtr(-1)
    <DllImport("user32.dll", EntryPoint:="SetWindowPos")> _
    Private Function SetWindowPos(ByVal hWnd As IntPtr, ByVal hWndInsertAfter As IntPtr, ByVal X As Integer, ByVal Y As Integer, ByVal cx As Integer, ByVal cy As Integer, ByVal uFlags As UInteger) As Boolean
    End Function

    Private Sub msgTimer_Tick(sender As Object, e As System.EventArgs) Handles msgTimer.Tick
        ' get handle to msgbox
        Dim hWnd As IntPtr = FindWindow("#32770", msgCaption)
        If Not hWnd.Equals(IntPtr.Zero) Then
            ' stop timer
            msgTimer.Stop()
            ' set msgbox topmost
            SetWindowPos(hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE Or SWP_SHOWWINDOW)
            ' set msgbox foreground
            SetForegroundWindow(hWnd)
        End If
    End Sub

    ' // show message box & return dialog result //
    Public Function MessageBoxEx(ByVal text As String _
            , Optional ByVal caption As String = "" _
            , Optional ByVal buttons As MessageBoxButtons = MessageBoxButtons.OK _
            , Optional ByVal icon As MessageBoxIcon = MessageBoxIcon.None _
            , Optional ByVal defaultButton As MessageBoxDefaultButton = MessageBoxDefaultButton.Button1) _
              As DialogResult

        msgCaption = caption 'msgbox titlebar text
        msgTimer.Interval = 30 ' timer speed
        msgTimer.Start() ' start timer
        ' show our msgbox
        Dim result As DialogResult = MessageBox.Show(text, caption, buttons, icon, defaultButton)
        msgTimer.Stop() ' make sure timer has stopped!
        msgTimer.Dispose()
        Return result ' return msgbox result.
    End Function
End Module

This is all my code in the project.

1 - For the test, create some new form1 by press Fichier -> Nouveau

2 - Then press Fenêtre -> Fermer tout

When you will press "Fermer Tout" all Child Form will be close.

Thx for your help

BTw : Sorry my windows is in french.

[Edgemeal]

[CODE]
Thx for your help

BTw : Sorry my windows is in french.

Well I made a simple MDI app and that CustomTabControl screwed up the app just like you say, very strange! I'd scrap it and look for a different control, maybe look in the code bank here? Good Luck!