protected override void OnPaint(PaintEventArgs e) {
if (GetStyle(ControlStyles.UserPaint)) {
Message m = new Message();
m.HWnd = Handle;
m.Msg = WM_PRINTCLIENT;
m.WParam = e.Graphics.GetHdc();
m.LParam = (IntPtr)PRF_CLIENT;
DefWndProc(ref m);
e.Graphics.ReleaseHdc(m.WParam);
}
base.OnPaint(e);
}
protected override void OnNotifyMessage(Message m) {