>If I exclude vcx from a project, I want to know what other potential problems I need to anticipate in additional to make sure that VFP can find the vcx during runtime. For example, will it have any effect on coding which is going to programmatically create class or add object based on the excluded vcx?

That depends on if that .VCX references other classes that are still "built-in" to your .EXE. My experience has been that once you go external to the .EXE to reference a .VCX, it wants to find most all of it's other classes external also. I've not run into this since VFP6, so this may no longer be a problem in VFP7 or 8, I don't know.