I don't know if this applies to vfp6 or not. Somehow I deleted a textbox class that all my textboxes inherit from on more than 150 forms. I was able to compile all with no errors as well as create an exe with no errors. The missing class was only discovered by running the program. Of course, the missing textbox class was easy to notice, but now I wonder if there are other classes missing that are seldom used and will not be noticed until the program is in the hands of customers? Refresh project and clean up project also don't find this. Anyone know a way to be sure all the classes are present?