>>>>>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.
>>>>
>>Hi,
>> Your code will work with a couple of changes.
>>#1. Specify the parameter type as "O" for object reference in FoxInfo. This will stop your type mismatch errors.
>>#2. If I remember correctly, _RetInt() truncates large #'s such as window handles.
>>I use the following construct instead.
>>_RetFloat((double)(UINT)lhwnd, 20, 0);
>>where lhwnd is the variable that holds the object handle to be returned.
>>
>>Hope this helps,
>>Ned
>
>
>Well, if this is the case, I'd like to know how to pass the form object to the API function.
>
>hWnd=GETHWND(_screen.activeform)
>or
>hWnd=GETHWND(This)
>
>Thanks for your response.

Just pass in an object reference, GETHWND(_SCREEN) should return the handle to VFP's main application window. Check out _WGetObjectClientWindow() if you want handles for child windows. What Win32 API calls do you want to make anyway?