设置默认打印机.txt

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Use this on form create (or whatever)...


  ComboBox1.Items := Printer.Printers; {populates ComboBox}

  ComboBox1.ItemIndex := Printer.PrinterIndex; {sets display to current

printer}


then, assuming you have a Button5...


procedure TForm1.Button5Click(Sender: TObject);

var

  Device: array[0..255] of Char;

  Driver: array[0..255] of char;

  Port: array[0..255] of char;

  s : array[0..255] of Char;

  hDeviceMode: THandle;

begin

  Printer.PrinterIndex := ComboBox1.ItemIndex;

  Printer.GetPrinter (Device, Driver, Port, hDeviceMode);

  StrCopy (s, Device);

  StrCat (s, ',');

  StrCat (s, Driver);

  StrCat (s, ',');

  StrCat (s, Port);

  WriteProfileString ('windows', 'device', s);

  StrCopy (s, 'windows');

  SendMessage (HWND_BROADCAST, WM_WININICHANGE, 0, LongInt(@s));

end;