MDOWN() function returns .T. or .F. Where do you get position in foxels from?

>hello people, when using mdown() in VFP Interactive i obtain 204,6 foxels, but when compile to exe and run the same function with the same position i obtain 127,75, someone see this approach?, how i can fix?
>
>thanks in advance
>
>with Best Regards
>
>Francisco Morosini