TransparentColor (Delphi)

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Code

procedure TForm1.Button1Click(Sender: TObject);
var
  Bitmap : TBitMap;
begin
  Bitmap := TBitmap.Create;
  try
    with Bitmap do begin
      LoadFromFile('factory.bmp');
      Transparent := True;
      TransParentColor := BitMap.canvas.pixels[50,50];
      Form1.Canvas.Draw(0,0,BitMap);
      TransparentMode := tmAuto;
      Form1.Canvas.Draw(50,50,BitMap);
    end;
  finally
    Bitmap.Free;
  end;
end;

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