>>>I'd like to know how to get a window handle (hWnd) in order to pass to Win32 API from VFP 5.0a.
>>>
>>>The below C-code is what I've been read from one of the thread:
>>>
>>>void GetObjectWHandle(ParamBlk *parm)
>>>{
>>> HWND hWnd;
>>> MHANDLE mhWnd;
>>>
>>> mhWnd=_WGetObjectWindow(&(parm->p[0].val));
>>> hWnd=_WhToHwnd(mhWnd);
>>> _RetInt((LONG)hWnd,8);
>>>}
>>>
>>>Then, what is the parameter type sould be specified in the FoxInfo ?
>>>
>>>FoxInfo myFoxInfo[] = {
>>> {"GETHWND",(FPFI) GetObjectWHandle, 1, "I"},
>>>};
>>>
>>>Once the .Fll have been created, what should I pass to it from a VFP form ?
>>>
>>>In Visual FoxPro:
>>>
>>>Set library to fll.fll
>>>hWnd=GETHWND(Thisform) && doesn't work, type miss match
>>>
>>>hWnd=GETHWND(_screen.activeform) && doesn't work. 'ACTIVEFORM' is not && an object
>>>
>>>Thanks in advance.
>>
>>I use three functions in to get this information. The main window can be retrieved using MainhWnd(). Forms use:

>>* Or ThisForm.Caption or a literal string
>>lnwhandle = _WFindTitl(_SCREEN.ActiveForm.Caption)
>>lnhWnd = _WhTohWnd(lnwhandle)

>>hth,
>
>Thanks for your response. It works, but the caption of form must be convert to uppercase.

I've never encountered this type of behavior, and testing indicates that the function is case sensitive. For example, using:

? _WFindTitl(_SCREEN.Caption) && Returns a value
? _WMainWind() && Same value as above
? _WFindTitl(UPPER(_SCREEN.Caption)) && Returns 0