>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?

Peter,
No it won't. You will still need to issue a SET CLASSLIB command within your application if you use CreateObject(). And you will still need to specify the VCX in your NewObject() call. The only difference will be that your application has to go beyond the EXE itself to find the library.

HTH.