HKEY_GET
error = handler(sc->handle, HKEY_GET, &arg);
case HKEY_GET:
case HKEY_GET:
hkey_lcd_brightness_max(h, HKEY_GET, &max);
hkey_lcd_brightness_min(h, HKEY_GET, &min);
case HKEY_GET:
case HKEY_GET:
hkey_lcd_brightness_max(h, HKEY_GET, &max);
hkey_lcd_brightness_min(h, HKEY_GET, &min);
hkey_lcd_brightness(h, HKEY_GET, &arg);
hkey_lcd_brightness_max(h, HKEY_GET, &max);
hkey_lcd_brightness_min(h, HKEY_GET, &min);
hkey_lcd_brightness(h, HKEY_GET, &arg);
hkey_sound_mute(h, HKEY_GET, &arg);
hkey_lcd_brightness(handle, HKEY_GET, &brightness);