NS/main/source/common/dll_state.h

//DLL State Flags

#define DLL_INACTIVE 0		// no dll
#define DLL_ACTIVE   1		// dll is running
#define DLL_PAUSED   2		// dll is paused
#define DLL_CLOSE    3		// closing down dll
#define DLL_TRANS    4 		// Level Transition

// DLL Pause reasons

#define DLL_NORMAL        0   // User hit Esc or something.
#define DLL_QUIT          4   // Quit now
#define DLL_RESTART       6   // Switch to launcher for linux, does a quit but returns 1

// DLL Substate info ( not relevant )
#define ENG_NORMAL         (1<<0)