切换打印机的彩色模式

切换打印机的彩色模式
　
uses Printers;
procedure TForm1.Button1Click(Sender: TObject);
var
Device : array[0..255] of char;
Driver : array[0..255] of char;
Port : array[0..255] of char;
hDMode : THandle;
PDMode : PDEVMODE;
begin
with Printer do begin
PrinterIndex := PrinterIndex;
GetPrinter(Device, Driver, Port, hDMode);
if hDMode <> 0 then begin
pDMode := GlobalLock(hDMode);
if pDMode <> nil then begin
pDMode.dmFields := pDMode.dmFields or dm_Color;
pDMode.dmColor := DMCOLOR_COLOR;
GlobalUnlock(hDMode);
end;
end;
PrinterIndex := PrinterIndex;
BeginDoc;
Canvas.Font.Color := clRed;
Canvas.TextOut(100,100, 'Red As A Rose!');
EndDoc;
end;
end;