>Dear All,
>
>After compile the project into a executive program...
>
>several additional class & programs added to project...
>
>1. _base.vcx
>2. _controls.vcx
>3. setobjrf.prg
>
>I don't know what they're for?


When you add object to your form that is contained in some class library, on compilation VFP will include entire library into your project.


If you used MS framework and/or some of the readymade builders, they probably referenced these class libraries without you even being aware of it.
These are probably class libraries shipped together with VFP.