How to check if the Workstation is locked?

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Code:

function IsWorkstationLocked: Boolean;

var

hDesktop: HDESK;

begin

Result := False;

hDesktop := OpenDesktop('default',

   0, False,

   DESKTOP_SWITCHDESKTOP);

if hDesktop <> 0 then

begin

   Result := not SwitchDesktop(hDesktop);

   CloseDesktop(hDesktop);

end;

end;

 

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