Merlin's Delphi Forge

There are two ways to determine the screen’s height and width.

1) Use the global Screen variable.

uses
  Forms;
...
  Screen.Height { Screen height in pixels }
  Screen.Width  { Screen width in pixels  }
...

2) Use the Windows API GetSystemMetrics() function. This function can be useful in applications that don’t use the VCL like console applications.

uses
  Windows;
...
  GetSystemMetric(SM_CXSCREEN) { Screen height in pixels }
  GetSystemMetric(SM_CYSCREEN) { Screen width in pixels  }
...

Although Delphi’s StretchDraw() function should work for icons it doesn’t The way to get round this is to use the Windows API DrawIconEx() function.

(* iNewWidth  - (Integer) New icon width
** iNewHeight - (Integer) New icon height
*)
DrawIconEx(Canvas.Handle, 0, 0, Icon.Handle, iNewWidth, iNewHeight, 0, 0, DI_NORMAL);