Moving a form without a titlebar

To make a form movable when it has no titlebar
Use

VB.NET Code:

#Region " MoveFormWithoutTitleBar "
Const WS_MAXIMIZEBOX As Integer = &H10000
 
    Const GWL_STYLE As Integer = -16
 
    Const WM_NCHITTEST As Integer = &H84
 
    Const HTCLIENT As Integer = &H1
 
    Const HTCAPTION As Integer = &H2
    <System.Runtime.InteropServices.DllImportAttribute("user32.dll", EntryPoint:="SetWindowLong")> _
 
    Public Shared Function SetWindowLong(<System.Runtime.InteropServices.InAttribute()> ByVal hWnd As System.IntPtr, ByVal nIndex As Integer, ByVal dwNewLong As UInt64) As Integer
 
    End Function
 
<System.Runtime.InteropServices.DllImportAttribute("user32.dll", EntryPoint:="GetWindowLong")> _
 
    Public Shared Function GetWindowLong(<System.Runtime.InteropServices.InAttribute()> ByVal hWnd As System.IntPtr, ByVal nIndex As Integer) As UInt64
 
    End Function
 
    'Example in a button click event - form load event may be more appropriate
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
 
        Dim Result As UInt64 = GetWindowLong(Me.Handle, GWL_STYLE)
 
        Result = (Result And Not CULng(WS_MAXIMIZEBOX))
 
        SetWindowLong(Me.Handle, GWL_STYLE, Result)
 
 
    End Sub
 
 
    Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
 
        Select Case m.Msg
 
            Case WM_NCHITTEST
 
                MyBase.WndProc(m)
 
                If CInt(m.Result) = HTCLIENT Then
 
                    m.Result = New IntPtr(HTCAPTION)
 
                End If
 
            Case Else
 
                MyBase.WndProc(m)
 
        End Select
 
    End Sub
#End Region

If you are using this method then you might also want to take a look at this thread to avoid the form being maximized whenever the user double clicks anywhere on the form: http://www.vbforums.com/showthread.php?t=616342

i just put a timer on 1millisecond interval and on tick i put If windowstate maximised then windowstate normal. Works just as well But yea you could do that way.

Quote:

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Originally Posted by Emcrank

i just put a timer on 1millisecond interval and on tick i put If windowstate maximised then windowstate normal. Works just as well But yea you could do that way.

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That's a pretty dumb reason to use a Timer. You can handle the Resize event, check for WindowState.Maximized and set it to normal instead of having a Timer constantly running in your program.

Quote:

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Originally Posted by JuggaloBrotha

That's a pretty dumb reason to use a Timer. You can handle the Resize event, check for WindowState.Maximized and set it to normal instead of having a Timer constantly running in your program.

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I agree that your suggestion is far better than using a timer to check every millisecond but with your method the form is still going to maximize and then minimize again. If you just use either of the API's that myself or Paul suggested in that thread then nothing at all happens when the user double clicks the form, so surely that is the best solution?

Changed it.