弹出打印属性后怎么保存设置呢？

Question

弹出打印属性，网上搜的代码
string printerName = _document.PrinterSettings.PrinterName;  if (printerName != null && printerName.Length > 0)
  {
  IntPtr pPrinter = IntPtr.Zero;
  IntPtr pDevModeOutput = IntPtr.Zero;
  IntPtr pDevModeInput = IntPtr.Zero;
  IntPtr nullPointer = IntPtr.Zero;  OpenPrinter(printerName, ref pPrinter, ref nullPointer);  int iNeeded = DocumentProperties(this.Handle, pPrinter, printerName, ref pDevModeOutput, ref pDevModeInput, 0);
  pDevModeOutput = System.Runtime.InteropServices.Marshal.AllocHGlobal(iNeeded);
  DocumentProperties(this.Handle, pPrinter, printerName, ref pDevModeOutput, ref pDevModeInput, 4);
    
  ClosePrinter(pPrinter);
  }