void UserInit(void);
/*
  User must support the function : UserInit();
*/
void UserLoopFun(void);
/*
  User must support the function : UserLoopFun();
*/
int UserCmd(unsigned char *Cmd,unsigned char *Response);
/*
  When user want use COMMAND "19",
  User must support the function : UserCmd();
  COMMAND "19" will pass the user command to function UserCmd();
  If the function will return something back, must put the data on
  the output buffer "Response", and return value must >0 .
*/
void AddUserTimerFunction(void (*fun)(void),unsigned timems);
/*
   The vxcomm.LIB support AddUserTimerFunction();
   when user want to install a function, and for a period time
   the system will call the function, just call this function to
   install it.

   for example:

    unsigned cnt;
    void UserCount(void)
    {
       cnt++;
    }

    void UserInit(void)
    {
      AddUserTimerFunction(UserCount,10); // every 10 ms will call UserCnt
    }
*/

int EnableCom(int port);
/*
    The function can force the eXserver to skip the com port
*/
int DisableCom(int port);
/*
    The function can force the eXserver to re-work with the com port
*/

extern int SocketConnected; 
/* 
  SocketConnected : total connect socket number 
*/

extern int EchoMode;
/*
  EchoMode: 
   0, default mode.
   1, will add the command number to the echo message.
      for example:
      input: 10
      output:107188E2 
*/