Hello Roberto.

>JA! Well, the only way with API that I'm know is calling "EnumWindows" API functions and then "IsIconic" API functions.
>
>The problem is that "EnumWindows" can't be call from VFP why it required one callback function.


You can do that with the fox:
Vfp.fll - Callback for Visual FoxPro File #20453



>
>You can create one FLL or DLL for workaround the problem.
>
>Regards,