Question

How can I get the screen resolution in Firemonkey 2 (Delphi XE3)?

Answer 1

It’s all changed in XE3. The platform support has been completely overhauled. See Pawel Glowacki’s article for more.

var
  ScreenSvc: IFMXScreenService;
  Size: TPointF;
begin
  if TPlatformServices.Current.SupportsPlatformService(IFMXScreenService, IInterface(ScreenSvc)) then
  begin
    Size := ScreenSvc.GetScreenSize;
    ....
  end;
end;

In spite of the overhaul, this is still not much use if you have multiple monitors. Perhaps there is some multimon support in FMX2, but it’s clearly not available in IFMXScreenService.