You can 'include' an include.h file as a 'File' object in the project. You can choose to include it or exclude it; it is only used at compile time. But just 'including' an include.h file in a project does not make it available to all classes, forms, or programs in the project. You have to 'include' the include.h file in each class (that means all classes in a VCX), form, and program for it to be used by that class, form, or program. No way to have a 'global' defined include file in VFP.