I'm using a function from a DLL which needs a structure as one of the parameters.
In VFP's help file I found following under Chapter 27: Extending Visual FoxPro with External Libraries

typedef struct _SYSTEMTIME { 
   WORD wYear ;
   WORD wMonth ;
   WORD wDayOfWeek ;
   WORD wDay ;
   WORD wHour ;
   WORD wMinute ;
   WORD wSecond ;
   WORD wMilliseconds ;
} SYSTEMTIME

DECLARE INTEGER GetSystemTime IN win32api STRING @
cBuff=SPACE(40)
=GetSystemTime(@cBuff)

tYear = ALLTRIM(STR(ASC(SUBSTR(cBuff,2)) *  ; 
   256 + ASC(SUBSTR(cBuff,1))))
tMonth = ALLTRIM(STR(ASC(SUBSTR(cBuff,4)) * ; 
   256 + ASC(SUBSTR(cBuff,3))))
tDOW = ALLTRIM(STR(ASC(SUBSTR(cBuff,6)) * ; 
   256 + ASC(SUBSTR(cBuff,5))))

Well. I'm a bit confused here how they got that cBuff has to be of size 40, when each word is only a size 2 and there is only 8 words, which I see as size 8*2 = 16. It says that you must create a 40-byte string buffer. Why?

But back to my function in the DLL and its structure, which looks like this

typedef struct _INITDATA
{ 
  DWORD dwSize; 
  DWORD dwVersionMajor;
  DWORD dwVersionMinor;
  DWORD dwVersionBuild;
  DWORD dwOptions;
  DWORD dwReserved1;
  DWORD dwReserved2;
  char  szDescription[MAXDESCRIPTIONLENGTH+1]; 

}  INITDATA, FAR* LPINITDATA; 

All I need is to make sure that dwSize is the value of the size of the structure. Since it is a Double Word I would imagine the have size of 4 so I tried following (MAXDESCRIPTIONLENGTH is 128) strings

chr(157)+chr(0)+chr(0)+chr(0)+replicate(chr(0), 153)
chr(0)+chr(157)+chr(0)+chr(0)+replicate(chr(0), 153)
chr(0)+chr(0)+chr(157)+chr(0)+replicate(chr(0), 153)
chr(0)+chr(0)+chr(0)+chr(157)+replicate(chr(0), 153)

Or chr(156) and 152 replicated chr(0)'s or chr(32)'s.

Any help here would be great. TIA,