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Frequently Asked Questions

How can I draw directly on the Windows Desktop?

Question:

How can I draw directly on the Windows Desktop?

Answer:

The following example uses the dc returned from GetDc(0)

with the Windows API drawing functions to draw on the 

Windows Desktop.



Example:



procedure TForm1.Button1Click(Sender: TObject);

var

  dc : hdc;

begin

  dc := GetDc(0);

  MoveToEx(Dc, 0, 0, nil);

  LineTo(Dc, 300, 300);

  ReleaseDc(0, Dc);

end;

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