// Gets the rect inside the parent window
Rect Ctrl::GetRectInParentWindow(void) const
{
	GuiLock __;
	Rect r = GetScreenRect();
	Ctrl *q = parent;
	while(q && !q->top)
		q = q->parent;
	if(q)
	{
		Rect pr = q->GetScreenRect();
		r -= pr.TopLeft();
	}
	return r;
}