//调用DocumentProperties
private void documentPropButton_Click(object sender, EventArgs e)
{
string printerName = printerList.SelectedItem.ToString();
if (printerName != null && printerName.Length > 0)
{
IntPtr pPrinter = IntPtr.Zero;
IntPtr pDevModeOutput = IntPtr.Zero;
IntPtr pDevModeInput = IntPtr.Zero;
IntPtr nullPointer = IntPtr.Zero;
WindowsAPI.OpenPrinter(printerName, ref pPrinter, ref nullPointer);
int iNeeded = WindowsAPI.DocumentProperties(this.Handle, pPrinter, printerName, ref pDevModeOutput, ref pDevModeInput, 0);
pDevModeOutput = System.Runtime.InteropServices.Marshal.AllocHGlobal(iNeeded);
WindowsAPI.DocumentProperties(this.Handle, pPrinter, printerName, ref pDevModeOutput, ref pDevModeInput, 4);
WindowsAPI.ClosePrinter(pPrinter);
}
}
