WNetGetResourceInformation

//

// Verify a server on the network.

//

DWORD

CheckServer(

   LPTSTR pszServer

   )

{  

   DWORD dwBufferSize = sizeof(NETRESOURCE);

   LPBYTE lpBuffer;                  // buffer

   NETRESOURCE nr;

   LPTSTR pszSystem = NULL;          // variable-length strings

   DWORD dwValue;


   //

   // Fill a block of memory with zeroes; then initialize

   // the NETRESOURCE structure.

   //

   ZeroMemory(nr, sizeof(nr));


   nr.dwScope       = RESOURCE_GLOBALNET;

   nr.dwType        = RESOURCETYPE_ANY;

   nr.lpRemoteName  = pszServer;


   //

   // First call the WNetGetResourceInformation function with

   // memory allocated to hold only a NETRESOURCE structure. This

   // method can succeed if all the NETRESOURCE pointers are NULL.

   // If the call fails because the buffer is too small, allocate

   // a larger buffer.

   //

   lpBuffer = (LPBYTE) malloc( dwBufferSize );

   if (lpBuffer == NULL)

       return FALSE;


   while ( WNetGetResourceInformation(&nr, lpBuffer, &dwBufferSize,

               &pszSystem) == ERROR_MORE_DATA)

   {

       lpBuffer = (LPBYTE) realloc(lpBuffer, dwBufferSize);

   }


   // Process the contents of the NETRESOURCE structure and the

   // variable-length strings in lpBuffer and set dwValue. When

   // finished, free the memory.


   free(lpBuffer);


   return dwValue;

}