Listing 1: Common definitions

#ifndef _COMMDEFS_H
#define _COMMDEFS_H
     
#include <afx.h>
     
#pragma warning( disable : 4237 )
     
typedef  BOOL bool;
#define  true  TRUE
#define  false FALSE
     
enum { startState = 0,
     invalidState = -1 };
     
#define emptyEvent '\0'
     
#endif //_COMMDEFS_H
//End of File