SDL_SetTimer - Set a callback to run after the specified number of milliseconds has elapsed.

       /*  Function  prototype  for  the  timer  callback function */ typedef Uint32 (*SDL_TimerCallback)(Uint32
       interval);

       Set a callback to run after the specified number of milliseconds has elapsed. The  callback  function  is
       passed  the current timer interval and returns the next timer interval. If the returned value is the same
       as the one passed in, the periodic alarm continues, otherwise a new alarm is scheduled.

       To cancel a currently running timer, call SDL_SetTimer(0,NULL);

       The timer callback function may run in a different thread than your main constant, and so shouldn't  call
       any functions from within itself.

       The  maximum  resolution  of  this  timer  is  10 ms, which means that if you request a 16 ms timer, your
       callback will run approximately 20 ms later on an unloaded system. If you wanted to set a flag  signaling
       a  frame  update  at  30  frames  per  second (every 33 ms), you might set a timer for 30 ms (see example
       below).

       If you use this function, you need to pass SDL_INIT_TIMER to SDL_Init().

              Note:

              This function is kept for compatibility but  has  been  superseded  by  the  new  timer  functions
              SDL_AddTimer and SDL_RemoveTimer which support multiple timers.

       SDL_SetTimer((33/10)*10, my_callback);

       SDL_SetTimer - Set a callback to run after the specified number of milliseconds has elapsed.

SDL_AddTimer

SDL                                          Tue 11 Sep 2001, 23:01                              SDL_SetTimer(3)

#include"SDL.h"intSDL_SetTimer(Uint32interval,SDL_TimerCallbackcallback);