protected override void WndProc(ref Message m)
{
if (m.Msg == WindowMessages.WM_DWMCOMPOSITIONCHANGED)
{
if (DesktopComposition.IsEnabled)
{
ExtendFrameIntoClientArea();
}
_owner.OnCompositionChanged(EventArgs.Empty);
}
if (m.Msg == WindowMessages.WM_DWMCOLORIZATIONCOLORCHANGED)
{
_owner.OnColorizationChanged(EventArgs.Empty);
}
if (DesktopComposition.IsEnabled)
{
if (m.Msg == WindowMessages.WM_ACTIVATE)
{
//
// MSDN recommends to do this on WM_ACTIVATE to correctly support
// maximized windows.
// http://msdn2.microsoft.com/library/bb688195.aspx
//
ExtendFrameIntoClientArea();
}
if (_form.CustomFrame)
{
if ((m.Msg == WindowMessages.WM_NCCALCSIZE) && (m.WParam.ToInt32() == 1))
{
//
// tell DWM we'll draw our own frame
//
m.Result = IntPtr.Zero;
return;
}
else if (m.Msg == WindowMessages.WM_NCHITTEST)
{
IntPtr result;
if (!NativeMethods.DwmDefWindowProc(GetHandleRef(), m.Msg, m.WParam, m.LParam, out result))
{
//
// we must do the hit testing ourselves
//
var pt = new Point(m.LParam.ToInt32());
var e = new FrameHitTestEventArgs(_form.Form, pt);
_owner.OnFrameHitTest(e);
if (!e.IsAssigned)
{
e.Result = DefaultHitTest(_form, pt);
}
result = new IntPtr((Int32)(e.Result));
}
m.Result = result;
return;
}
}
}
base.WndProc(ref m);
}
