Extract an icon from application.

uses shellApi;

…

procedure TForm1.Button1Click(Sender: TObject);
var
MyIcon : TIcon;
begin
if Opendialog1.Execute then
begin
MyIcon := TIcon.Create;
MyIcon.Handle := ExtractIcon(hInstance, PChar(Opendialog1.filename),0);
DrawIcon(Form1.Canvas.Handle, 10, 10, MyIcon.Handle);
MyIcon.Free;
end;
end;