Hi,

I found that on Windows platform, Canvas size may mismatch with control's size. See the following code:

procedure TForm1.FormPaint(Sender: TObject);
begin
  Caption := Format('Form=%d:%d, Canvas=%d:%d', [Width, Height,
Canvas.Width, Canvas.Height]);
end;

Run this code on Windows, I found that when the form is enlarged, the 2 sizes matches, but when the form shrinks Canvas' size is always the largest value it has been.

Yes, that's true, and I have no idea whether it's by design or not.