Как проверить, включен ли ActiveDesktop?

function IsActiveDeskTopOn: Boolean; 
var 
  h: hWnd; 
begin 
  h := FindWindow('Progman', nil); 
  h := FindWindowEx(h, 0, 
             'SHELLDLL_DefView', nil); 
  h := FindWindowEx(h, 0, 
       'Internet Explorer_Server', nil); 
  Result := h <> 0; 
end; 

Взято из https://forum.sources.ru

uses
   ComObj, ShlObj, ActiveX;
 
 // Check if Active Desktop is enabled (2) 
function IsActiveDesktopEnable: Boolean;
 const
   CLSID_ActiveDesktop: TGUID = '{75048700-EF1F-11D0-9888-006097DEACF9}';
 var
   ActiveDesk: IActiveDesktop;
   ComponentsOpt: TComponentsOpt;
   hr: HRESULT;
   dwReserved: DWORD;
 begin
   ZeroMemory(@ComponentsOpt, SizeOf(TComponentsOpt));
   ComponentsOpt.dwSize := SizeOf(TComponentsOpt);
   hr := CoCreateInstance(CLSID_ActiveDesktop, nil, CLSCTX_INPROC_SERVER,
     CLSID_ActiveDesktop, ActiveDesk);
   if SUCCEEDED(hr) then
   begin
     hr := ActiveDesk.GetDesktopItemOptions(ComponentsOpt, dwReserved);
     // ActiveDesk._Release; 
  end;
   Result := ComponentsOpt.fActiveDesktop;
 end;

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