FormBorderStyle to None when maximizing the form...

[arsmakman]

Argh! This is driving me nuts!

I have a normal form (FormBorderStyle = Sizeable).

When the user maximizes the form, the form's border should disappear and fully cover the screen. Like so:

Private Sub frmVideo_SizeChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.SizeChanged
 
    If Me.WindowState = FormWindowState.Maximized Then
        'Remove border
        Me.FormBorderStyle = Windows.Forms.FormBorderStyle.None
        'Bring to front
        Me.TopMost = True
    End If
 
End Sub

Problem is, when the form gets maximized and border changed to None, the form doesn't cover the whole screen.

The form gets the same height as when it is maximized with a titlebar on top. So, the form is about 20 pixels too short, leaving most of the Windows taskbar uncovered.

So, apparently, if the FormBorderStyle changes after the form has maximized, the change in size is not corrected.

Therefore, my question is: How do I change a form's size when it's maximized or how do I change the FormBorderStyle before maximization is finished?

Thanks for any help!

Alexander.

[user name]

Try running your code in the Resize event of the form.

[arsmakman]

I've tried that already, but to no avail...

[Bulldog]

This should do it. This says "if the form is maximised, then change the borderstyle and then maximize";

    Private Sub Form1_Resize(ByVal sender As System.Object, ByVal e As System.EventArgs) _
    Handles MyBase.Resize
        If Me.WindowState = FormWindowState.Maximized Then
            Me.FormBorderStyle = Windows.Forms.FormBorderStyle.None
            Me.WindowState = FormWindowState.Maximized
        End If
    End Sub

[arsmakman]

Nope, same problem.

But I have now solved the issue in a round-about way:

    Private Resizing As Boolean = False

    Private Sub HandleMaximizing() Handles Me.Resize

        If Me.WindowState = FormWindowState.Maximized And Not Resizing Then
            Resizing = True
            Me.Hide()
            Me.WindowState = FormWindowState.Normal
        End If

        If Resizing Then
            Me.FormBorderStyle = Windows.Forms.FormBorderStyle.None
            Me.WindowState = FormWindowState.Maximized
            Me.Show()
            Resizing = False
        End If

    End Sub

This will:
1. Hide the form.
2. Change it back Normal size, which triggers the resize-event again.
3. Change the border style to None.
4. Maximize the form again.
5. Make the form visible.

I hide the form, so the user won't see the form jumping all over the place. This still gives a short flicker, so it isn't ideal.

If anyone has a better solution, please let me know!

Alexander.