"Herfried K. Wagner [MVP]" wrote:

>
> You may want to listen for the 'WM_NCLBUTTONDBLCLK' message in your form's
> 'WndProc' and "eat" this message if the form's 'WindowState' property is set
> to 'Maximized'.
>
> \\\
> Private Const WM_NCLBUTTONDBLCLK As Int32 = &HA3
> ///
>

>I have a form which is maximized when I show it.
> The form maximize button is not enabled so cannot be used to un-maximize
> the
> form. However, if a double-click is done on the form titlebar the form
> resizes to its unmaximized size.
> I know I can change the unmaximized size to be equal to the maximized size
> but is there a way to prevent the un-maximize that occurs when the form
> titlebar is doubleclicked?

"Engineerik" wrote:

>
> "Herfried K. Wagner [MVP]" wrote:
>
> >
> > You may want to listen for the 'WM_NCLBUTTONDBLCLK' message in your form's
> > 'WndProc' and "eat" this message if the form's 'WindowState' property is set
> > to 'Maximized'.
> >
> > \\\
> > Private Const WM_NCLBUTTONDBLCLK As Int32 = &HA3
> > ///
> >
>
> This does the trick:
>
> Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
> Const WM_NCLBUTTONDBLCLK As Int32 = &HA3
> If m.Msg = WM_NCLBUTTONDBLCLK Then
> Exit Sub
> End If
> MyBase.WndProc(m)
> End Sub
>
>
> Thanks,