Active Desktopu açıp/kapamak

Kod:
uses ComObj, ShlObj, ActiveX;

procedure EnableActiveDesktop(bValue: Boolean);
const
CLSID_ActiveDesktop: TGUID = (D1: $75048700; D2: $EF1F; D3: $11D0;
D4: ($98, $88, $00, $60, $97, $DE, $AC, $F9));
var
MyObject: IUnknown;
ActiveDesk: IActiveDesktop;
twpoComponentOpt: TComponentsOpt;
begin
MyObject := CreateComObject(CLSID_ActiveDesktop);
ActiveDesk := MyObject as IActiveDesktop;
with twpoComponentOpt do
begin
ZeroMemory(@twpoComponentOpt, SizeOf(TComponentsOpt));
dwSize := SizeOf(twpoComponentOpt);
fEnableComponents := bValue;
// fActiveDesktop := True;
end;
ActiveDesk.SetDesktopItemOptions(twpoComponentOpt, 0);
ActiveDesk.ApplyChanges(AD_APPLY_ALL); end;