Printing the barcode

To print a barcode image one approach is to Draw the Picture on the Printer.Canvas, as shown in the code sample below.

Note that the Picture is created in HIMETRIC units, and so to print the image at the correct size these must be converted into printer pixel units using the GetDeviceCaps() function.

 

procedure TForm1.Button2Click(Sender: TObject);
var
        ii: integer;
        jj: integer;
        Rect: TRect;
        pScalex: Integer;
        pScaley: integer;
begin
      DoBarcode(); {recreate the barcode image}
      {set the target rectangle for drawing on the printer}
      {change from mm to pixels}
      pScalex:=GetDeviceCaps((Printer.Handle),LOGPIXELSX);
      pScaley:=GetDeviceCaps((Printer.Handle),LOGPIXELSY);
      ii:=(Barcode1.ImageWidth*pScalex) div 2540;
      jj:=(Barcode1.ImageHeight*pScaley) div 2540;
      Rect.Left:=200;
      Rect.Top:=200;
      Rect.Right:=Rect.Left+ii;
      Rect.Bottom:=Rect.Top+jj;
      Printer.BeginDoc;
      Printer.Canvas.StretchDraw(Rect, Barcode1.Picture.Graphic);
      Printer.EndDoc;
end;

 

More:

Distributing programs using the dBarcode components