Hello Michel! Here is the aditional information about topic: Some DLL functions require more complex parameters, such as structures or arrays. If the function requires a pointer to a structure, you must determine the layout of the structure, then emulate it as a string in Visual FoxPro before passing it or receiving it from the DLL function. For example, the Windows system function GetSystemTime( ) expects a pointer to a structure consisting of eight words or unsigned 16-bit integers indicating the year, month, day, and so on. The structure is defined this way: typedef struct _SYSTEMTIME { WORD wYear ; WORD wMonth ; WORD wDayOfWeek ; WORD wDay ; WORD wHour ; WORD wMinute ; WORD wSecond ; WORD wMilliseconds ; } SYSTEMTIME To pass data between Visual FoxPro and the GetSystemTime( ) function, you must create a 40-byte string buffer (consisting initially of spaces) and then pass the address of this string to the function for it to fill in. When the string is returned, you must parse it in 2-byte increments to extract the individual fields of the structure. The following fragment illustrates how you could extract three of the fields from the structure: 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)))) I think that it must be in FAQ under topic "How to pass structures into Win32 API". Have a happy day Vladimir Shevchenko > However, the 3rd parameter says "A pointer to a buffer containing the user > information structure.".