Ramil,

VFP doesn't have built-in support for callback functions. You can read more about that at http://fox.wikis.com/wc.dll?Wiki~CallbacksAndEvents~WIN_COM_DNA.

>Hi all,
>
>What is the VFP function that emulates the VB AddressOf when passing values to Win32 API. This is passing to the DLL a pointer to the callback routine.
>

>example:
>declare long CreateEnv in Win32APIDLL
>declare long SetCallbackSolver in Win32APIDLL (long pEnv, long pcbf, double @ pUserData)
>pEnv=CreateEnv()
>nError=0
>dBestObj=1E+30
>nError=SetCallbackSolver(pEnv, AddressOf MySolverCallback, dBestObj) <-- here
>

>Or is this not possible with VFP8?