🚀 go-pugleaf

Hi all, trying to use QueryDosDevice() to return a list of all Symbolic 
names and the Logical device that they correlate too.

DWORD QueryDosDevice(

    LPCTSTR lpDeviceName, // address of MS-DOS device name string
    LPTSTR lpTargetPath, // address of buffer for storing query results
    DWORD ucchMax  // maximum storage capacity of buffer
   );

I'm trying to do this, initially by passing a NULL value for the 
lpDeviceName.  However, i'm struggling to find a way to determine that 
required size of the lpTargetPath.  If i pass a buffer that is too small, 
the function returns a 0 and GetLastError reports "The data area passed to a 
system call is too small".  However there seems to be no way to bet the size 
of the required buffer.  Usually, in API's, the size parameter is modified 
if the buffer is too small, but in this case there seems to be no way to 
determine the required buffer size.

Any suggestions?

Thanks in advance,

Mike C