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Frequently Asked Questions

drawing transparent text onto a TBitmap

Question:

How can I draw transparent text on a TBitmap?

Answer:

The following example demonstrates drawing transparent text on 
the canvas of a TBitmap.

Example:

procedure TForm1.Button1Click(Sender: TObject);
var
  OldBkMode : integer;
begin
  Image1.Picture.Bitmap.Canvas.Font.Color := clBlue;
  OldBkMode := SetBkMode(Image1.Picture.Bitmap.Canvas.Handle,
                         TRANSPARENT);
  Image1.Picture.Bitmap.Canvas.TextOut(10, 10, 'Hello');
  SetBkMode(Image1.Picture.Bitmap.Canvas.Handle,
            OldBkMode);
end;

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