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	get-xkey.c (561B)
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	1 #include <stdio.h>
	2 #include <stdlib.h>
	3 #include <X11/Xlib.h>
	4
	5 int main(void) {
	6 Display *dpy;
	7 Window win;
	8 XEvent e;
	9 int s;
	10
	11 dpy = XOpenDisplay(NULL);
	12 if (dpy == NULL) {
	13 fprintf(stderr, "Cannot open display\n");
	14 exit(1);
	15 }
	16
	17 s = DefaultScreen(dpy);
	18 win = XCreateSimpleWindow(dpy, RootWindow(dpy, s), 10, 10, 100, …
	19 XSelectInput(dpy, win, ExposureMask \| KeyPressMask);
	20 XMapWindow(dpy, win);
	21
	22 while (1) {
	23 XNextEvent(dpy, &e);
	24 if (e.type == KeyPress)
	25 printf("0x%x\n",e.xkey.keycode);
	26 }
	27
	28 XCloseDisplay(dpy);
	29 return 0;
	30 }