>In VFP 5, I can put in the control source of a column in
>a grid with 'thisform.xclass.xfunction(x,y,z)'
>and this works well,but in VFP 6, it gives me error :
> Error loading file,control source: unknown member
>
>Any idea from Anyone??

Move this code to Form.Init event. I guess, the problem is that now Grid gets initialized before XClass and cannot find it.