TestWindow::TestWindow()
{	
        // Array<ParentCtrl> layoutArray;
        // Note that we're using static_cast here, for the sake of simplicity. When you have several layouts in same array, using One<>, which has RTTI support, or dynamic_cast would be better.

	auto& t = layoutArray.Add(new WithTestLayout<ParentCtrl>); // <-- Array "owns" the new ParentCtrl with layout. No need to delete explicitly.
	CtrlLayout(static_cast<WithTestLayout<ParentCtrl>&>(t));
        Add(t.SizePos()); 
	
}