NAME

       install_keyboard - Installs the Allegro keyboard interrupt handler.

SYNOPSIS

       #include <allegro.h>

       int install_keyboard();

DESCRIPTION

       Installs  the  Allegro  keyboard interrupt handler. You must call this before using any of
       the keyboard input routines. Once you have set up the Allegro handler, you can  no  longer
       use operating system calls or C library functions to access the keyboard.

       Note  that  on some platforms the keyboard won't work unless you have set a graphics mode,
       even if this function returns a success value before calling set_gfx_mode. This can happen
       in  environments  with  graphic  windowed  modes, since Allegro usually reads the keyboard
       through the graphical window (which appears after the set_gfx_mode call). Example:

          allegro_init();
          install_timer();
          install_keyboard();
          /* We are not 100% sure we can read the keyboard yet! */
          if (set_gfx_mode(GFX_AUTODETECT, 640, 480, 0, 0) != 0)
             abort_on_error("Couldn't set graphic mode!");

          /* Now we are guaranteed to be able to read the keyboard. */
          readkey();

RETURN VALUE

       Returns zero on success, or a negative number on failure (but you may decide not to  check
       the return value as this function is very unlikely to fail).

SEE ALSO

       remove_keyboard(3alleg4),   poll_keyboard(3alleg4),   key(3alleg4),   keypressed(3alleg4),
       readkey(3alleg4),              ureadkey(3alleg4),              keyboard_callback(3alleg4),
       keyboard_ucallback(3alleg4),                          keyboard_lowlevel_callback(3alleg4),
       three_finger_flag(3alleg4),           key_led_flag(3alleg4),            set_leds(3alleg4),
       set_keyboard_rate(3alleg4), set_gfx_mode(3alleg4)