Why 2 zero bytes?

Vlad

>Hi Edward!
>
>You should use:
>
>char* instead of char:
>
>char* ConvertTime(void)
>
>Aditionally make sure, that after the end of string there are 2 zero byte.
>(make a same string, but that is longer by 1 char, which is zero - 0x0.)
>
>BB
>
>BTW
>
>Why dont you make fox libray function (FLL), instead of dll-s? With the same code and 2 more declarations you get native VFP functions. FLL is a DLL! Even you can use .DLL extensions. (Returning a value from FLL is made by a special function RETVAL() or RETCHAR() or RETINT() ...)
>
>>>edward,
>>>your problem is most probably that you are returning a pointer to a string
>>>from
>>>and your function type is char (single character)
>>>
>>>Arnon
>>>
>>>
>>>>
>>>>I wrote a small dll that calls the localtime() function in Visual C++ 5.0.
>>>>When I call this function,ConvertTime(), I get a memory error. The dll
>>>>works fine because I can call the test() function. I am a Foxpro
>>>>programmer, not a C++ programer, and I can't figure out what I am doing
>>>>wrong. Could someone help? Here is
>>>> the code:
>>>>
>>>
>>>> ///////////////////////////////////////
>>>> //
>>>> // ConvertTime()
>>>> //
>>>> ///////////////////////////////////////
>>>>
>>>> char ConvertTime(void)
>>>> {
>>>> struct tm *newtime;
>>>> time_t aclock;
>>>> char* rtntime;
>>>>
>>>> aclock=8067157205;
>>>>
>>>> newtime = localtime(&aclock);
>>>>
>>>> rtntime = asctime(newtime);
>>>>
>>>> return(*rtntime);
>>>>
>>>> }
>>>>
>>Arnon:
>>
>>How do I allow the function to return a string. As near as I can tell, you can't declare the function return type as "string".
>>
>>I've declared the dll in VFP as such:
>> DECLARE STRING ConvertTime IN Timeconv AS ConvertTime
>>
>>So how do I make ConvertTime() (code above) return a string?
>>
>>Ed
>>>>
>>>> /////////////////////////////////////
>>>> //
>>>> // test()
>>>> ////////////////////////////////////
>>>>
>>>> int rtn ;
>>>>
>>>> char test(void)
>>>> {
>>>> rtn = 6;
>>>> return (rtn);
>>>> }
>>>>
>>>>
>>>> Here is the .def file
>>>>
>>>> ;;;;;;;;;;;;;;;;;;;;;;
>>>> ;
>>>> ; timeconv.def
>>>> ;
>>>> ;;;;;;;;;;;;;;;;;;;;;;;;;
>>>>
>>>> LIBRARY timeconv
>>>> CODE PRELOAD MOVEABLE DISCARDABLE
>>>> DATA PRELOAD SINGLE
>>>>
>>>> EXPORTS
>>>> ConvertTime
>>>> test
>>>>
>>>>
>>>> Thanks
>>>>
>>>> Ed
>>>>
>>>> Thanks, Ed
>>>>
>>>>