set_leds - Sets the state of the keyboard LED indicators. Allegro game programming library.

       Overrides  the  state  of  the  keyboard LED indicators. The parameter is a bitmask containing any of the
       values KB_SCROLOCK_FLAG, KB_NUMLOCK_FLAG, and KB_CAPSLOCK_FLAG, or -1 to restore  the  default  behavior.
       Example:

          /* Cycle led indicators. */
          set_leds(KB_SCROLOCK_FLAG);
          rest(1000);
          set_leds(KB_CAPSLOCK_FLAG);
          rest(1000);
          set_leds(KB_NUMLOCK_FLAG);
          rest(1000);
          set_leds(-1);

       Note that the led behaviour cannot be guaranteed on some platforms, some leds might not react, or none at
       all.  Therefore  you  shouldn't rely only on them to communicate information to the user, just in case it
       doesn't get through.

       set_leds - Sets the state of the keyboard LED indicators. Allegro game programming library.

install_keyboard(3alleg4), key_led_flag(3alleg4)

Allegro                                           version 4.4.3                                set_leds(3alleg4)

#include<allegro.h>voidset_leds(intleds);