This is not exactly the way I tried it. I tried it in my develop-environment. I build the app and type the SET CLASSLIB in my commandline. I get an errormessage when I try to modify a form.

I like to try your solution but in the mean time I tried the solutions of Mihir and it's working fine so far.

Thanks for your help
Marco

>>I did but it doesn't work.
>>Thanks anyway.
>
>The approach I've seen is to put all the classlibs and PRGs into a separate app. Then create a main program for that app like:
>
>* AuxAppMain.PRG
>SET CLASSLIB TO myClasses IN AuxApp.APP ADDITIVE
>* ...
>SET PROCEDURE TO myPrgs ADDITIVE
>* ...
>
>The build the APP, and in the main program of your working app, include DO AuxApp.APP.
>
>Is that what you tried?
>
>-- Randy