...determine if the current session is remotely controlled?

{
  Call GetSystemMetrics() with the Flag SM_REMOTECONTROL to determine
  if the current session is remotely controlled.
  Its value is TRUE if the current session is remotely controlled;
  FALSE otherwise.
}

function IsRemotelyControlled: Boolean;
const
  SM_REMOTECONTROL = $2001; // from WinUser.h
begin
  Result := Boolean(GetSystemMetrics(SM_REMOTECONTROL));
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if IsRemotelyControlled then
    ShowMessage('Remotely controlled.')
  else
    ShowMessage('Not Remotely controlled.')
end;

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