Компилятор: C++ Builder

 NETRESOURCE netResource;

 ZeroMemory(&netResource, sizeof(NETRESOURCE));
 netResource.dwType = RESOURCETYPE_DISK;
 netResource.lpLocalName = "Q:";
 netResource.lpRemoteName = "\\\\SPIKE\\homedir";

 if(WNetAddConnection2(&netResource, "firebird", "djf", NULL) != NO_ERROR)
 {
 LPVOID lpMsgBuf;

 FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
 FORMAT_MESSAGE_FROM_SYSTEM,
 NULL, 
 GetLastError(), 
 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
 (LPTSTR)&lpMsgBuf, 
 0, 
 NULL);

 MessageBox(Application->Handle, 
 (const char *)lpMsgBuf, 
 "GetLastError",
 MB_OK | MB_ICONINFORMATION);

 LocalFree(lpMsgBuf);
 }