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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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1 <HTML
2 ><HEAD
3 ><TITLE
4 >SDL_Event</TITLE
5 ><META
6 NAME="GENERATOR"
7 CONTENT="Modular DocBook HTML Stylesheet Version 1.61
8 "><LINK
9 REL="HOME"
10 TITLE="SDL Library Documentation"
11 HREF="index.html"><LINK
12 REL="UP"
13 TITLE="SDL Event Structures."
14 HREF="eventstructures.html"><LINK
15 REL="PREVIOUS"
16 TITLE="SDL Event Structures."
17 HREF="eventstructures.html"><LINK
18 REL="NEXT"
19 TITLE="SDL_ActiveEvent"
20 HREF="sdlactiveevent.html"></HEAD
21 ><BODY
22 CLASS="REFENTRY"
23 BGCOLOR="#FFF8DC"
24 TEXT="#000000"
25 LINK="#0000ee"
26 VLINK="#551a8b"
27 ALINK="#ff0000"
28 ><DIV
29 CLASS="NAVHEADER"
30 ><TABLE
31 WIDTH="100%"
32 BORDER="0"
33 CELLPADDING="0"
34 CELLSPACING="0"
35 ><TR
36 ><TH
37 COLSPAN="3"
38 ALIGN="center"
39 >SDL Library Documentation</TH
40 ></TR
41 ><TR
42 ><TD
43 WIDTH="10%"
44 ALIGN="left"
45 VALIGN="bottom"
46 ><A
47 HREF="eventstructures.html"
48 >Prev</A
49 ></TD
50 ><TD
51 WIDTH="80%"
52 ALIGN="center"
53 VALIGN="bottom"
54 ></TD
55 ><TD
56 WIDTH="10%"
57 ALIGN="right"
58 VALIGN="bottom"
59 ><A
60 HREF="sdlactiveevent.html"
61 >Next</A
62 ></TD
63 ></TR
64 ></TABLE
65 ><HR
66 ALIGN="LEFT"
67 WIDTH="100%"></DIV
68 ><H1
69 ><A
70 NAME="SDLEVENT"
71 >SDL_Event</A
72 ></H1
73 ><DIV
74 CLASS="REFNAMEDIV"
75 ><A
76 NAME="AEN3214"
77 ></A
78 ><H2
79 >Name</H2
80 >SDL_Event&nbsp;--&nbsp;General event structure</DIV
81 ><DIV
82 CLASS="REFSECT1"
83 ><A
84 NAME="AEN3217"
85 ></A
86 ><H2
87 >Structure Definition</H2
88 ><PRE
89 CLASS="PROGRAMLISTING"
90 >typedef union{
91 Uint8 type;
92 SDL_ActiveEvent active;
93 SDL_KeyboardEvent key;
94 SDL_MouseMotionEvent motion;
95 SDL_MouseButtonEvent button;
96 SDL_JoyAxisEvent jaxis;
97 SDL_JoyBallEvent jball;
98 SDL_JoyHatEvent jhat;
99 SDL_JoyButtonEvent jbutton;
100 SDL_ResizeEvent resize;
101 SDL_QuitEvent quit;
102 SDL_UserEvent user;
103 SDL_SywWMEvent syswm;
104 } SDL_Event;</PRE
105 ></DIV
106 ><DIV
107 CLASS="REFSECT1"
108 ><A
109 NAME="AEN3220"
110 ></A
111 ><H2
112 >Structure Data</H2
113 ><DIV
114 CLASS="INFORMALTABLE"
115 ><A
116 NAME="AEN3222"
117 ></A
118 ><P
119 ></P
120 ><TABLE
121 BORDER="0"
122 CLASS="CALSTABLE"
123 ><TBODY
124 ><TR
125 ><TD
126 ALIGN="LEFT"
127 VALIGN="TOP"
128 ><TT
129 CLASS="STRUCTFIELD"
130 ><I
131 >type</I
132 ></TT
133 ></TD
134 ><TD
135 ALIGN="LEFT"
136 VALIGN="TOP"
137 >The type of event</TD
138 ></TR
139 ><TR
140 ><TD
141 ALIGN="LEFT"
142 VALIGN="TOP"
143 ><TT
144 CLASS="STRUCTFIELD"
145 ><I
146 >active</I
147 ></TT
148 ></TD
149 ><TD
150 ALIGN="LEFT"
151 VALIGN="TOP"
152 ><A
153 HREF="sdlactiveevent.html"
154 >Activation event</A
155 ></TD
156 ></TR
157 ><TR
158 ><TD
159 ALIGN="LEFT"
160 VALIGN="TOP"
161 ><TT
162 CLASS="STRUCTFIELD"
163 ><I
164 >key</I
165 ></TT
166 ></TD
167 ><TD
168 ALIGN="LEFT"
169 VALIGN="TOP"
170 ><A
171 HREF="sdlkeyboardevent.html"
172 >Keyboard event</A
173 ></TD
174 ></TR
175 ><TR
176 ><TD
177 ALIGN="LEFT"
178 VALIGN="TOP"
179 ><TT
180 CLASS="STRUCTFIELD"
181 ><I
182 >motion</I
183 ></TT
184 ></TD
185 ><TD
186 ALIGN="LEFT"
187 VALIGN="TOP"
188 ><A
189 HREF="sdlmousemotionevent.html"
190 >Mouse motion event</A
191 ></TD
192 ></TR
193 ><TR
194 ><TD
195 ALIGN="LEFT"
196 VALIGN="TOP"
197 ><TT
198 CLASS="STRUCTFIELD"
199 ><I
200 >button</I
201 ></TT
202 ></TD
203 ><TD
204 ALIGN="LEFT"
205 VALIGN="TOP"
206 ><A
207 HREF="sdlmousebuttonevent.html"
208 >Mouse button event</A
209 ></TD
210 ></TR
211 ><TR
212 ><TD
213 ALIGN="LEFT"
214 VALIGN="TOP"
215 ><TT
216 CLASS="STRUCTFIELD"
217 ><I
218 >jaxis</I
219 ></TT
220 ></TD
221 ><TD
222 ALIGN="LEFT"
223 VALIGN="TOP"
224 ><A
225 HREF="sdljoyaxisevent.html"
226 >Joystick axis motion event</A
227 ></TD
228 ></TR
229 ><TR
230 ><TD
231 ALIGN="LEFT"
232 VALIGN="TOP"
233 ><TT
234 CLASS="STRUCTFIELD"
235 ><I
236 >jball</I
237 ></TT
238 ></TD
239 ><TD
240 ALIGN="LEFT"
241 VALIGN="TOP"
242 ><A
243 HREF="sdljoyballevent.html"
244 >Joystick trackball motion event</A
245 ></TD
246 ></TR
247 ><TR
248 ><TD
249 ALIGN="LEFT"
250 VALIGN="TOP"
251 ><TT
252 CLASS="STRUCTFIELD"
253 ><I
254 >jhat</I
255 ></TT
256 ></TD
257 ><TD
258 ALIGN="LEFT"
259 VALIGN="TOP"
260 ><A
261 HREF="sdljoyhatevent.html"
262 >Joystick hat motion event</A
263 ></TD
264 ></TR
265 ><TR
266 ><TD
267 ALIGN="LEFT"
268 VALIGN="TOP"
269 ><TT
270 CLASS="STRUCTFIELD"
271 ><I
272 >jbutton</I
273 ></TT
274 ></TD
275 ><TD
276 ALIGN="LEFT"
277 VALIGN="TOP"
278 ><A
279 HREF="sdljoybuttonevent.html"
280 >Joystick button event</A
281 ></TD
282 ></TR
283 ><TR
284 ><TD
285 ALIGN="LEFT"
286 VALIGN="TOP"
287 ><TT
288 CLASS="STRUCTFIELD"
289 ><I
290 >resize</I
291 ></TT
292 ></TD
293 ><TD
294 ALIGN="LEFT"
295 VALIGN="TOP"
296 ><A
297 HREF="sdlresizeevent.html"
298 >Application window resize event</A
299 ></TD
300 ></TR
301 ><TR
302 ><TD
303 ALIGN="LEFT"
304 VALIGN="TOP"
305 ><TT
306 CLASS="STRUCTFIELD"
307 ><I
308 >quit</I
309 ></TT
310 ></TD
311 ><TD
312 ALIGN="LEFT"
313 VALIGN="TOP"
314 ><A
315 HREF="sdlquitevent.html"
316 >Application quit request event</A
317 ></TD
318 ></TR
319 ><TR
320 ><TD
321 ALIGN="LEFT"
322 VALIGN="TOP"
323 ><TT
324 CLASS="STRUCTFIELD"
325 ><I
326 >user</I
327 ></TT
328 ></TD
329 ><TD
330 ALIGN="LEFT"
331 VALIGN="TOP"
332 ><A
333 HREF="sdluserevent.html"
334 >User defined event</A
335 ></TD
336 ></TR
337 ><TR
338 ><TD
339 ALIGN="LEFT"
340 VALIGN="TOP"
341 ><TT
342 CLASS="STRUCTFIELD"
343 ><I
344 >syswm</I
345 ></TT
346 ></TD
347 ><TD
348 ALIGN="LEFT"
349 VALIGN="TOP"
350 ><A
351 HREF="sdlsyswmevent.html"
352 >Undefined window manager event</A
353 ></TD
354 ></TR
355 ></TBODY
356 ></TABLE
357 ><P
358 ></P
359 ></DIV
360 ></DIV
361 ><DIV
362 CLASS="REFSECT1"
363 ><A
364 NAME="AEN3289"
365 ></A
366 ><H2
367 >Description</H2
368 ><P
369 >The <SPAN
370 CLASS="STRUCTNAME"
371 >SDL_Event</SPAN
372 > union is the core to all event handling is SDL, its probably the most important structure after <SPAN
373 CLASS="STRUCTNAME"
374 >SDL_Surface</SPAN
375 >. <SPAN
376 CLASS="STRUCTNAME"
377 >SDL_Event</SPAN
378 > is a union of all event structures used in SDL, using it is a simple matter of knowing which union member relates to which event <TT
379 CLASS="STRUCTFIELD"
380 ><I
381 >type</I
382 ></TT
383 >.</P
384 ><P
385 ><DIV
386 CLASS="INFORMALTABLE"
387 ><A
388 NAME="AEN3297"
389 ></A
390 ><P
391 ></P
392 ><TABLE
393 BORDER="1"
394 CLASS="CALSTABLE"
395 ><THEAD
396 ><TR
397 ><TH
398 ALIGN="LEFT"
399 VALIGN="TOP"
400 >Event <TT
401 CLASS="STRUCTFIELD"
402 ><I
403 >type</I
404 ></TT
405 ></TH
406 ><TH
407 ALIGN="LEFT"
408 VALIGN="TOP"
409 >Event Structure</TH
410 ></TR
411 ></THEAD
412 ><TBODY
413 ><TR
414 ><TD
415 ALIGN="LEFT"
416 VALIGN="MIDDLE"
417 ><TT
418 CLASS="LITERAL"
419 >SDL_ACTIVEEVENT</TT
420 ></TD
421 ><TD
422 ALIGN="LEFT"
423 VALIGN="MIDDLE"
424 ><A
425 HREF="sdlactiveevent.html"
426 ><SPAN
427 CLASS="STRUCTNAME"
428 >SDL_ActiveEvent</SPAN
429 ></A
430 ></TD
431 ></TR
432 ><TR
433 ><TD
434 ALIGN="LEFT"
435 VALIGN="TOP"
436 ><TT
437 CLASS="LITERAL"
438 >SDL_KEYDOWN/UP</TT
439 ></TD
440 ><TD
441 ALIGN="LEFT"
442 VALIGN="TOP"
443 ><A
444 HREF="sdlkeyboardevent.html"
445 ><SPAN
446 CLASS="STRUCTNAME"
447 >SDL_KeyboardEvent</SPAN
448 ></A
449 ></TD
450 ></TR
451 ><TR
452 ><TD
453 ALIGN="LEFT"
454 VALIGN="TOP"
455 ><TT
456 CLASS="LITERAL"
457 >SDL_MOUSEMOTION</TT
458 ></TD
459 ><TD
460 ALIGN="LEFT"
461 VALIGN="TOP"
462 ><A
463 HREF="sdlmousemotionevent.html"
464 ><SPAN
465 CLASS="STRUCTNAME"
466 >SDL_MouseMotionEvent</SPAN
467 ></A
468 ></TD
469 ></TR
470 ><TR
471 ><TD
472 ALIGN="LEFT"
473 VALIGN="TOP"
474 ><TT
475 CLASS="LITERAL"
476 >SDL_MOUSEBUTTONDOWN/UP</TT
477 ></TD
478 ><TD
479 ALIGN="LEFT"
480 VALIGN="TOP"
481 ><A
482 HREF="sdlmousebuttonevent.html"
483 ><SPAN
484 CLASS="STRUCTNAME"
485 >SDL_MouseButtonEvent</SPAN
486 ></A
487 ></TD
488 ></TR
489 ><TR
490 ><TD
491 ALIGN="LEFT"
492 VALIGN="TOP"
493 ><TT
494 CLASS="LITERAL"
495 >SDL_JOYAXISMOTION</TT
496 ></TD
497 ><TD
498 ALIGN="LEFT"
499 VALIGN="TOP"
500 ><A
501 HREF="sdljoyaxisevent.html"
502 ><SPAN
503 CLASS="STRUCTNAME"
504 >SDL_JoyAxisEvent</SPAN
505 ></A
506 ></TD
507 ></TR
508 ><TR
509 ><TD
510 ALIGN="LEFT"
511 VALIGN="TOP"
512 ><TT
513 CLASS="LITERAL"
514 >SDL_JOYBALLMOTION</TT
515 ></TD
516 ><TD
517 ALIGN="LEFT"
518 VALIGN="TOP"
519 ><A
520 HREF="sdljoyballevent.html"
521 ><SPAN
522 CLASS="STRUCTNAME"
523 >SDL_JoyBallEvent</SPAN
524 ></A
525 ></TD
526 ></TR
527 ><TR
528 ><TD
529 ALIGN="LEFT"
530 VALIGN="TOP"
531 ><TT
532 CLASS="LITERAL"
533 >SDL_JOYHATMOTION</TT
534 ></TD
535 ><TD
536 ALIGN="LEFT"
537 VALIGN="TOP"
538 ><A
539 HREF="sdljoyhatevent.html"
540 ><SPAN
541 CLASS="STRUCTNAME"
542 >SDL_JoyHatEvent</SPAN
543 ></A
544 ></TD
545 ></TR
546 ><TR
547 ><TD
548 ALIGN="LEFT"
549 VALIGN="TOP"
550 ><TT
551 CLASS="LITERAL"
552 >SDL_JOYBUTTONDOWN/UP</TT
553 ></TD
554 ><TD
555 ALIGN="LEFT"
556 VALIGN="TOP"
557 ><A
558 HREF="sdljoybuttonevent.html"
559 ><SPAN
560 CLASS="STRUCTNAME"
561 >SDL_JoyButtonEvent</SPAN
562 ></A
563 ></TD
564 ></TR
565 ><TR
566 ><TD
567 ALIGN="LEFT"
568 VALIGN="TOP"
569 ><TT
570 CLASS="LITERAL"
571 >SDL_QUIT</TT
572 ></TD
573 ><TD
574 ALIGN="LEFT"
575 VALIGN="TOP"
576 ><A
577 HREF="sdlquitevent.html"
578 ><SPAN
579 CLASS="STRUCTNAME"
580 >SDL_QuitEvent</SPAN
581 ></A
582 ></TD
583 ></TR
584 ><TR
585 ><TD
586 ALIGN="LEFT"
587 VALIGN="TOP"
588 ><TT
589 CLASS="LITERAL"
590 >SDL_SYSWMEVENT</TT
591 ></TD
592 ><TD
593 ALIGN="LEFT"
594 VALIGN="TOP"
595 ><A
596 HREF="sdlsyswmevent.html"
597 ><SPAN
598 CLASS="STRUCTNAME"
599 >SDL_SysWMEvent</SPAN
600 ></A
601 ></TD
602 ></TR
603 ><TR
604 ><TD
605 ALIGN="LEFT"
606 VALIGN="TOP"
607 ><TT
608 CLASS="LITERAL"
609 >SDL_VIDEORESIZE</TT
610 ></TD
611 ><TD
612 ALIGN="LEFT"
613 VALIGN="TOP"
614 ><A
615 HREF="sdlresizeevent.html"
616 ><SPAN
617 CLASS="STRUCTNAME"
618 >SDL_ResizeEvent</SPAN
619 ></A
620 ></TD
621 ></TR
622 ><TR
623 ><TD
624 ALIGN="LEFT"
625 VALIGN="TOP"
626 ><TT
627 CLASS="LITERAL"
628 >SDL_USEREVENT</TT
629 ></TD
630 ><TD
631 ALIGN="LEFT"
632 VALIGN="TOP"
633 ><A
634 HREF="sdluserevent.html"
635 ><SPAN
636 CLASS="STRUCTNAME"
637 >SDL_UserEvent</SPAN
638 ></A
639 ></TD
640 ></TR
641 ></TBODY
642 ></TABLE
643 ><P
644 ></P
645 ></DIV
646 ></P
647 ></DIV
648 ><DIV
649 CLASS="REFSECT1"
650 ><A
651 NAME="AEN3377"
652 ></A
653 ><H2
654 >Use</H2
655 ><P
656 >The <SPAN
657 CLASS="STRUCTNAME"
658 >SDL_Event</SPAN
659 > structure has two uses</P
660 ><P
661 ></P
662 ><UL
663 COMPACT="COMPACT"
664 ><LI
665 ><P
666 >Reading events on the event queue</P
667 ></LI
668 ><LI
669 ><P
670 >Placing events on the event queue</P
671 ></LI
672 ></UL
673 ><P
674 >Reading events from the event queue is done with either <A
675 HREF="sdlpollevent.html"
676 ><TT
677 CLASS="FUNCTION"
678 >SDL_PollEvent</TT
679 ></A
680 > or <A
681 HREF="sdlpeepevents.html"
682 ><TT
683 CLASS="FUNCTION"
684 >SDL_PeepEvents</TT
685 ></A
686 >. We'll use <TT
687 CLASS="FUNCTION"
688 >SDL_PollEvent</TT
689 > and step through an example.</P
690 ><P
691 >First off, we create an empty <SPAN
692 CLASS="STRUCTNAME"
693 >SDL_Event</SPAN
694 > structure.
695 <PRE
696 CLASS="PROGRAMLISTING"
697 >SDL_Event test_event;</PRE
698 >
699 <TT
700 CLASS="FUNCTION"
701 >SDL_PollEvent</TT
702 > removes the next event from the event queue, if there are no events on the queue it returns <SPAN
703 CLASS="RETURNVALUE"
704 >0</SPAN
705 > otherwise it returns <SPAN
706 CLASS="RETURNVALUE"
707 >1</SPAN
708 >. We use a <TT
709 CLASS="FUNCTION"
710 >while</TT
711 > loop to process each event in turn.
712 <PRE
713 CLASS="PROGRAMLISTING"
714 >while(SDL_PollEvent(&#38;test_event)) {</PRE
715 >
716 The <TT
717 CLASS="FUNCTION"
718 >SDL_PollEvent</TT
719 > function take a pointer to an <SPAN
720 CLASS="STRUCTNAME"
721 >SDL_Event</SPAN
722 > structure that is to be filled with event information. We know that if <TT
723 CLASS="FUNCTION"
724 >SDL_PollEvent</TT
725 > removes an event from the queue then the event information will be placed in our <SPAN
726 CLASS="STRUCTNAME"
727 >test_event</SPAN
728 > structure, but we also know that the <I
729 CLASS="EMPHASIS"
730 >type</I
731 > of event will be placed in the <TT
732 CLASS="STRUCTFIELD"
733 ><I
734 >type</I
735 ></TT
736 > member of <SPAN
737 CLASS="STRUCTNAME"
738 >test_event</SPAN
739 >. So to handle each event <TT
740 CLASS="STRUCTFIELD"
741 ><I
742 >type</I
743 ></TT
744 > seperately we use a <TT
745 CLASS="FUNCTION"
746 >switch</TT
747 > statement.
748 <PRE
749 CLASS="PROGRAMLISTING"
750 > switch(test_event.type) {</PRE
751 >
752 We need to know what kind of events we're looking for <I
753 CLASS="EMPHASIS"
754 >and</I
755 > the event <TT
756 CLASS="STRUCTFIELD"
757 ><I
758 >type</I
759 ></TT
760 >'s of those events. So lets assume we want to detect where the user is moving the mouse pointer within our application. We look through our event types and notice that <TT
761 CLASS="LITERAL"
762 >SDL_MOUSEMOTION</TT
763 > is, more than likely, the event we're looking for. A little <A
764 HREF="sdlmousemotionevent.html"
765 >more</A
766 > research tells use that <TT
767 CLASS="LITERAL"
768 >SDL_MOUSEMOTION</TT
769 > events are handled within the <A
770 HREF="sdlmousemotionevent.html"
771 ><SPAN
772 CLASS="STRUCTNAME"
773 >SDL_MouseMotionEvent</SPAN
774 ></A
775 > structure which is the <TT
776 CLASS="STRUCTFIELD"
777 ><I
778 >motion</I
779 ></TT
780 > member of <SPAN
781 CLASS="STRUCTNAME"
782 >SDL_Event</SPAN
783 >. We can check for the <TT
784 CLASS="LITERAL"
785 >SDL_MOUSEMOTION</TT
786 > event <TT
787 CLASS="STRUCTFIELD"
788 ><I
789 >type</I
790 ></TT
791 > within our <TT
792 CLASS="FUNCTION"
793 >switch</TT
794 > statement like so:
795 <PRE
796 CLASS="PROGRAMLISTING"
797 > case SDL_MOUSEMOTION:</PRE
798 >
799 All we need do now is read the information out of the <TT
800 CLASS="STRUCTFIELD"
801 ><I
802 >motion</I
803 ></TT
804 > member of <SPAN
805 CLASS="STRUCTNAME"
806 >test_event</SPAN
807 >.
808 <PRE
809 CLASS="PROGRAMLISTING"
810 > printf("We got a motion event.\n");
811 printf("Current mouse position is: (%d, %d)\n", test_event.motion.x, test_event.motion.y);
812 break;
813 default:
814 printf("Unhandled Event!\n");
815 break;
816 }
817 }
818 printf("Event queue empty.\n");</PRE
819 ></P
820 ><P
821 >It is also possible to push events onto the event queue and so use it as a two-way communication path. Both <A
822 HREF="sdlpushevent.html"
823 ><TT
824 CLASS="FUNCTION"
825 >SDL_PushEvent</TT
826 ></A
827 > and <A
828 HREF="sdlpeepevents.html"
829 ><TT
830 CLASS="FUNCTION"
831 >SDL_PeepEvents</TT
832 ></A
833 > allow you to place events onto the event queue. This is usually used to place a <TT
834 CLASS="LITERAL"
835 >SDL_USEREVENT</TT
836 > on the event queue, however you could use it to post fake input events if you wished. Creating your own events is a simple matter of choosing the event type you want, setting the <TT
837 CLASS="STRUCTFIELD"
838 ><I
839 >type</I
840 ></TT
841 > member and filling the appropriate member structure with information.
842 <PRE
843 CLASS="PROGRAMLISTING"
844 >SDL_Event user_event;
845
846 user_event.type=SDL_USEREVENT;
847 user_event.user.code=2;
848 user_event.user.data1=NULL;
849 user_event.user.data2=NULL;
850 SDL_PushEvent(&#38;user_event);</PRE
851 ></P
852 ></DIV
853 ><DIV
854 CLASS="REFSECT1"
855 ><A
856 NAME="AEN3434"
857 ></A
858 ><H2
859 >See Also</H2
860 ><P
861 ><A
862 HREF="sdlpollevent.html"
863 ><TT
864 CLASS="FUNCTION"
865 >SDL_PollEvent</TT
866 ></A
867 >,
868 <A
869 HREF="sdlpushevent.html"
870 ><TT
871 CLASS="FUNCTION"
872 >SDL_PushEvent</TT
873 ></A
874 >,
875 <A
876 HREF="sdlpeepevents.html"
877 ><TT
878 CLASS="FUNCTION"
879 >SDL_PeepEvents</TT
880 ></A
881 ></P
882 ></DIV
883 ><DIV
884 CLASS="NAVFOOTER"
885 ><HR
886 ALIGN="LEFT"
887 WIDTH="100%"><TABLE
888 WIDTH="100%"
889 BORDER="0"
890 CELLPADDING="0"
891 CELLSPACING="0"
892 ><TR
893 ><TD
894 WIDTH="33%"
895 ALIGN="left"
896 VALIGN="top"
897 ><A
898 HREF="eventstructures.html"
899 >Prev</A
900 ></TD
901 ><TD
902 WIDTH="34%"
903 ALIGN="center"
904 VALIGN="top"
905 ><A
906 HREF="index.html"
907 >Home</A
908 ></TD
909 ><TD
910 WIDTH="33%"
911 ALIGN="right"
912 VALIGN="top"
913 ><A
914 HREF="sdlactiveevent.html"
915 >Next</A
916 ></TD
917 ></TR
918 ><TR
919 ><TD
920 WIDTH="33%"
921 ALIGN="left"
922 VALIGN="top"
923 >SDL Event Structures.</TD
924 ><TD
925 WIDTH="34%"
926 ALIGN="center"
927 VALIGN="top"
928 ><A
929 HREF="eventstructures.html"
930 >Up</A
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935 VALIGN="top"
936 >SDL_ActiveEvent</TD
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940 ></BODY
941 ></HTML
942 >