>>>I am trying trying to call a DLL function. The VB code that works properly is as Follows:
>>>
>>>//////////////////////////
>>>Declare Function FPInitialize% Lib "ETFAXD32.DLL" (lpdFaxHandle&)
>>>
>>>Private Sub Command1_Click()
>>>
>>> wstatus = FPInitialize(dFaxHandle)
>>>
>>>End Sub
>>>/////////////////////////
>>>
>>>In this code, the value of dFaxHandle is properly assigned a Long Integer value, and wstatus is assigned 0, indicating success.
>>>
>>>I'm trying to do the samething in VFP 5.0. Here is the code for VFP:
>>>
>>>DECLARE INTEGER FPInitialize IN ETFAXD32 AS FpInitialize ;
>>> Long @nFpHandle
>>>
>>>nStatus = FpInitialize(@nFaxHandle)
>>>
>>>As near as I can tell, this should return the samething, but a Long integer gets assigned to nFaxHandle(as I would expect) and a large integer gets assigned to wStatus, indicating failure.
>>>
>>>This seems simple enough, what am I missing here?
>>>
>>>Ed
>>
>>You need to initialize the nFaxHandle before the call to FpInitialize. VFP doesn't initialize variables passed as params to a DLL function.
>>
>>So, include a
>>
>>nFaxHandle = 0
>>
>>before nStatus = ...
>>
>>Vlad
>
>Sorry Vlad, I forgot to put that on this sample. I initialize nFaxHandle with 0 at the top of the program. Looking at it with the debuger I can see that it does indeed have the value of 0 prior to calling FPInitialixe(). Any other ideas?
>
>Ed

It looks OK to me. What's the prototype for the function in DLL?

Vlad