The VBA examples in this manual use the VBA String() function to pre-dimension a string output buffer,
where nChars is number of characters to be written to the output string.
Dim strOutput As String ' VBA string type strOutput = String(nChars, " ") ' Len(strOutput) = nChars
IMPORTANT: ANSI C users must add one to this value when allocating memory.
char *szOutput; // C string type // nChars = number of characters required in output string szOutput = malloc(nChars + 1); // add one to the number of characters
Note that this is only for a C string type (char *szOutput).
For byte arrays, (unsigned char *lpOutput), use the exact number of bytes in your C/C++ code.
Dim lpOutput() As Byte ' VBA byte array type ReDim lpOutput(nBytes - 1) ' VBA array of exactly nBytes (0..nBytes-1)
unsigned char *lpOutput; // C byte array type // nBytes = number of bytes required in output byte array lpOutput = malloc(nBytes); // exact number of bytes