>I have set a default include file with path in the options and hit the set as default button. I can get out of VFP 6.0 and back in and then , at the command prompt, type "? _INCLUDE" and get the proper path and name of my default include file. However, the only way I can get the include constants in my form methods is to put #INCLUDE MYSTUFF.H in at the top of the method code.

This only applys to a form when you create it, you can check the value by going to the Forms menu (while in the FOrm Designer) and clicking on Include File, that where you should put it so you don't need to in every method you use.