Printing with CF

Hello,

I'm trying to print from an CF-Application on an usb-printer. I can
print a screenshot on the printer by using some API-Functions. But now
I'm trying to print my own Graphic (All Data of an DataTable; the
result should look like a datagrid). I've been starting with this code:

DEVMODE dm = new DEVMODE();

dm.dmSize = System.Convert.ToInt16(Marshal.SizeOf(dm));

dm.dmOrientation = (Int16)PageOrientation.DMORIENT_LANDSCAPE;

dm.dmPrintQuality = DMRES_DRAFT;

//IntPtr hPrinterDC = CreateDC(null, "PCL Inkjet", null, ref dm);

IntPtr hPrinterDC = CreateDC("pcl.dll", "PCL Inkjet", "LPT2", ref dm);

// --- 2--- mit DeviceContext Dokument Starten

//DOCINFO di = new DOCINFO();

//di.cbSize = Marshal.SizeOf(di);

//di.fwType = 0;

//di.lpszDocName = IntPtr.Zero; //
Marshal.StructureToPtr(@"\printdocument.txt", true);

//di.lpszOutput = IntPtr.Zero;//
Marshal.StructureToPtr(@"\printdocument.prn", true);

//di.lpszDataType = IntPtr.Zero;

//di.fwType = 0;

String lpszDocName = @"\Image.bmp";

String lpszOutput = @"\Image.prn";

String lbszDataType = "";

int cbMemSize = 20 + GetStringAllocSize(lpszDocName) +

GetStringAllocSize(lpszOutput) + GetStringAllocSize(lbszDataType);

IntPtr p = LocalAlloc(0x40, cbMemSize);

DOCINFO di = new DOCINFO();

di.cbSize = 20;

di.fwType = 0;

di.lpszDocName = new IntPtr(p.ToInt32() + 20);

di.lpszOutput = new IntPtr(di.lpszDocName.ToInt32() +
GetStringAllocSize(lpszDocName));

di.lpszDataType = IntPtr.Zero;

Marshal.StructureToPtr(lpszDocName, di.lpszDocName, false);

//Marshal.StructureToPtr(lpszOutput, di.lpszOutput, false);

if (StartDoc(hPrinterDC, ref di) > 0)

{

//--- 3 --- Graphic von Hdc erzeugen

//Graphics g = Graphics.FromHdc(hPrinterDC);

//--- 4 --- draw eg. a Text

g.DrawString("Hallo!",

new Font("Arial", 20, FontStyle.Regular),

new SolidBrush(Color.Black),

new RectangleF(20, 20, 20, 20));

//--- 5 --- StartPage

StartPage(hPrinterDC);

//TODO scale

//--- 6 --- EndPage

EndPage(hPrinterDC);

//--- 7 --- EndDocument

EndDoc(hPrinterDC);

//--- 8 --- CleanUp

g.Dispose();

}

DeleteDC(hPrinterDC);



The printer put's a sheet of paper, but doesn't print anything.

I also tried the following instead of g.DrawString (...)

String str = "Hello World!";

TextOut(hPrinterDC, 50, 140, 0, IntPtr.Zero, str, (ushort)str.Length,
IntPtr.Zero);



But this didn't work either.

What's wrong with my code? does anyone has an other idea?



Many thanks in advance,

Sabine