private static extern bool EnumPrintProcessors(string pName,string pEnvironment,UInt32 Level,IntPtr pPrintProcessorInfo,UInt32 cbBuf,

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

     if (EnumPrintProcessors("","",1,IntPtr.Zero, 0, ref cbNeeded, ref cReturned))

        if (EnumPrintProcessors("", "", 1, pAddr, cbNeeded , ref cbNeeded, ref cReturned))