private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (msg == (int)WM.SHOWWINDOW)
{
if ((int)lParam == 3 && this.Visibility != Visibility.Visible) // 3 == SW_PARENTOPENING
{
handled = true; //handle this message so window isn't shown until we want it to
}
}
if (msg == (int)WM.MOUSEACTIVATE)
{
handled = true;
return(new IntPtr(3));
}
if (msg == (int)WM.LBUTTONDOWN)
{
var pt = new Point((int)lParam & 0xFFFF, ((int)lParam >> 16) & 0xFFFF);
SafeNativeMethods.PostMessage(ownerHandle, (uint)WM.NCLBUTTONDOWN, (IntPtr)getHitTestValue(pt), IntPtr.Zero);
}
if (msg == (int)WM.NCHITTEST)
{
var ptScreen = new Point((int)lParam & 0xFFFF, ((int)lParam >> 16) & 0xFFFF);
Point ptClient = PointFromScreen(ptScreen);
Cursor cursor = getCursor(ptClient);
if (cursor != Cursor)
{
Cursor = cursor;
}
}
return(IntPtr.Zero);
}