protected override void WndProc(ref Message m)
{
switch ((Msg)m.Msg)
{
// If the mouse is over the size grip, change the cursor
case Msg.WM_MOUSEMOVE:
{
if (FromParamToMouseButtons((int)m.WParam.ToInt32()) == MouseButtons.None)
{
Point p = new Point(LowOrder((int)m.LParam.ToInt32()), HighOrder((int)m.LParam.ToInt32()));
if (this.SizingGrip && this.SizeGripBounds.Contains(p))
{
this.Cursor = Cursors.SizeNWSE;
return;
}
else
{
this.Cursor = Cursors.Default;
}
}
break;
}
// If the left mouse button is pushed over the size grip,
// send the WM a message to begin a window resize operation
case Msg.WM_LBUTTONDOWN:
{
Point p = new Point(LowOrder((int)m.LParam.ToInt32()), HighOrder((int)m.LParam.ToInt32()));
Form form = FindForm();
if (this.SizingGrip && this.SizeGripBounds.Contains(p))
{
// For top level forms it's not enoug to send a NCLBUTTONDOWN message, so
// we make a direct call to our XplatUI engine.
if (!form.IsMdiChild)
{
XplatUI.BeginMoveResize(form.Handle);
}
XplatUI.SendMessage(form.Handle, Msg.WM_NCLBUTTONDOWN, (IntPtr)HitTest.HTBOTTOMRIGHT, IntPtr.Zero);
return;
}
break;
}
}
base.WndProc(ref m);
}
