Manpages - SDL_PollEvent.3

SDL_PollEvent - Polls for currently pending events.

#include “SDL.h”

int SDL_PollEvent*(*SDL_Event *event);

Polls for currently pending events, and returns 1 if there are any pending events, or 0 if there are none available.

If event is not NULL, the next event is removed from the queue and stored in that area.

  SDL_Event event; /* Event structure */

  .
  .
  .
  /* Check for events */
  while(SDL_PollEvent(&event)){  /* Loop until there are no events left on the queue */
    switch(event.type){  /* Process the appropiate event type */
      case SDL_KEYDOWN:  /* Handle a KEYDOWN event */         
        printf("Oh! Key press
  ");
        break;
      case SDL_MOUSEMOTION:
        .
        .
        .
      default: /* Report an unhandled event */
        printf("I don't know what this event is!
  ");
    }
  }

SDL_Event, SDL_WaitEvent, SDL_PeepEvents