static extern bool XcvData(IntPtr hXcv, [MarshalAs(UnmanagedType.LPWStr)] string pszDataName, IntPtr InputData, uint cbInputData,

Declare Function XcvData Lib "winspool.drv" (TODO) As TODO

        if (XcvData(hXcv, "IPAddress", IntPtr.Zero, 0, buf, 256, out cbOutputNeeded, out dwStatus))