Re : Printer Status

[Gordon Truslove]

I've been trying to get the printer status using GetPrinter and
Printer_Info_2

I'm getting closer, but it still fails.

Error 122 - The data area passed to a system call is too small.

[StructLayout( LayoutKind.Sequential,CharSet=CharSet.Auto)]

public struct PRINTERINFO2

{

[MarshalAs(UnmanagedType.LPTStr)]public string pServerName;

[MarshalAs(UnmanagedType.LPTStr)]public string pPrinterName;

[MarshalAs(UnmanagedType.LPTStr)]public string pShareName;

[MarshalAs(UnmanagedType.LPTStr)]public string pPortName;

[MarshalAs(UnmanagedType.LPTStr)]public string pDriverName;

[MarshalAs(UnmanagedType.LPTStr)]public string pComment;

[MarshalAs(UnmanagedType.LPTStr)]public string pLocation;

public IntPtr pDevMode;

[MarshalAs(UnmanagedType.LPTStr)]public string pSepFile;

[MarshalAs(UnmanagedType.LPTStr)]public string pPrintProcessor;

[MarshalAs(UnmanagedType.LPTStr)]public string pDatatype;

[MarshalAs(UnmanagedType.LPTStr)]public string pParameters;

public IntPtr pSecurityDescriptor;

public int Attributes;

public int Priority;

public int DefaultPriority;

public int StartTime;

public int UntilTime;

public int Status;

public int cJobs;

public int AveragePPM;

}

public class Printer

{

[ DllImport( "winspool.drv",CharSet=CharSet.Unicode,ExactSpelli ng=false,

CallingConvention=CallingConvention.StdCall )]

public static extern long OpenPrinter(string pPrinterName,ref IntPtr
phPrinter, int pDefault);

[ DllImport(

"winspool.drv",CharSet=CharSet.Unicode,ExactSpelli ng=true,

CallingConvention=CallingConvention.StdCall )]

public static extern long ClosePrinter(IntPtr hPrinter);

[ DllImport(

"winspool.drv" ,CharSet=CharSet.Auto)]

public static extern bool GetPrinter(IntPtr hPrinter,int Level,ref
PRINTERINFO2 pPrinter,int cbBuf,ref int pcbNeeded);

}

public class App

{

public static void Main ()

{

System.IntPtr lhPrinter=new System.IntPtr();

Printer.OpenPrinter("Epson EPL-5700",ref lhPrinter,0);

PRINTERINFO2 PI=new PRINTERINFO2();

int Need=0;

Console.WriteLine(Printer.GetPrinter(lhPrinter,2,r ef
PI,Marshal.SizeOf(PI),ref Need));
Console.WriteLine("Error "+Marshal.GetLastWin32Error());
Printer.ClosePrinter(lhPrinter);

Console.ReadLine();

}

}