PopupWindow for printer properties

[PeterS]

Hi, I’d like to show printer properties dialog in my code.
The first possibility I have is to use the standard windows dialog like:

System.Windows.Forms.PrintDialog printDialog = new System.Windows.Forms.PrintDialog();
printDialog.Document = this.printDocument;
printDialog.ShowDialog();

Then the user has to click the „Properties“ button and the dialog I wanna have pops up.
But I’d like to show this dialog directly without using System.Windows.Forms.PrintDialog.

Here is the code I have from codeproject.net:

[DllImport("winspool.Drv", EntryPoint = "DocumentPropertiesW", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
static extern int DocumentProperties(IntPtr hwnd, IntPtr hPrinter, [MarshalAs(UnmanagedType.LPWStr)] string pDeviceName, IntPtr pDevModeOutput, ref IntPtr pDevModeInput, int fMode);
[DllImport("kernel32.dll")]
static extern IntPtr GlobalLock(IntPtr hMem);
[DllImport("kernel32.dll")]
static extern bool GlobalUnlock(IntPtr hMem);
[DllImport("kernel32.dll")]
static extern bool GlobalFree(IntPtr hMem);
public void OpenPrinterPropertiesDialog(PrinterSettings printerSettings, System.IntPtr pHandle)
{
IntPtr hDevMode = printerSettings.GetHdevmode(printerSettings.Defaul tPageSettings);
IntPtr pDevMode = GlobalLock(hDevMode);
int sizeNeeded = DocumentProperties(pHandle, IntPtr.Zero, printerSettings.PrinterName, pDevMode, ref pDevMode, 0);
IntPtr devModeData = Marshal.AllocHGlobal(sizeNeeded);
DocumentProperties(pHandle, IntPtr.Zero, printerSettings.PrinterName, devModeData, ref pDevMode, 4);
GlobalUnlock(hDevMode);
printerSettings.SetHdevmode(devModeData);
printerSettings.DefaultPageSettings.SetHdevmode(de vModeData);
GlobalFree(hDevMode);
Marshal.FreeHGlobal(devModeData);
}

The function OpenPrinterProperties calls the dialog I need. The only problem is:
-the dialog does not represents the settings printerSettings.DefaultPageSettings
-the changes you make in this dialog are not kept when you close the dialog
(normally the changes should be written in printerSettings.DefaultPageSettings)

What’s wrong with this code?