Message pump question

[lucky6969b]

BOOL CMDIApp::OnIdle(LONG lCount)
{
	// TODO: Add your specialized code here and/or call the base class
	if (app)
	{
		 app->Run();
	}

	return CWinApp::OnIdle(lCount);
}

Thanks guys for answering my previous questions, I managed to create the object as single instance and there is no problem. Thanks a lot. However, I have some difficulty with the following problem. As shown above, the application (as a single instance, I should have named it something else ), is completely engaged in rendering and ignores all messages toward other MDI child windows. So the result is a plain window which looks like a SDI.

See mdi1.png

Which is supposed to look like mdi2.png

Does anyone know how to alter the program to make it look exactly like picture 2 while
preserving dx functionalities?
Thanks
Jack