I asked about this article: Inventor 2012 Hole Feature Dialog (blogs http://beinginventive.typepad.com/being-inventive/2011/06/inventor-2012-hole-feature-dialog.html )
Hi,
You can check the Control ID or Window Handle of any control/window inside a dialog/window using Spy++ which is part of Visual Studio: http://msdn.microsoft.com/en-us/library/dd460756.aspx
Cheers,