[NumLock]

потому что:

Код:

  _RTL_CRITICAL_SECTION = record
    DebugInfo: PRTLCriticalSectionDebug;
    LockCount: Longint;
    RecursionCount: Longint;
    OwningThread: THandle;
    LockSemaphore: THandle;
    Reserved: DWORD;
  end;
  TRTLCriticalSection = _RTL_CRITICAL_SECTION;