>I am confused about how the include file works when using classes. I create a form class and specifiy an include file. I then subclass that class, the include file is no longer filled in but it appears the defines are still available. Can I use the include file again on the subclass without problems? Then I make a form from the subclass. Here again the include file is still not shown. Are the include files additive in nature? I have no idea on how that works. It's not like the include file is a property of the class. Any tips?

The include file info is not copied into subclass when it's created. The Class Designer will use value stored in the _INCLUDE global variable.