itch.io

Just tried it in Delphi

procedure TForm1.FormCreate(Sender: TObject); 
begin
   form1.Width := 5120;
   form1.Height := 1600;
   form1.Top := 0;
   form1.Left := 0;
   form1.FormStyle := fsStayOnTop;
   form1.BorderStyle := bsNone;
 end;

Did exactly what I was after (but not in GM...)

I take it topmost is just altering the Z order of the window as opposed to what Delphi's fsStayOnTop does

Possibly I need to get to the TOPMOST option here?