HKEY_SET
hkey_sound_mute(sc->handle, HKEY_SET, &mute);
error = handler(sc->handle, HKEY_SET, &arg);
case HKEY_SET:
case HKEY_SET:
case HKEY_SET:
case HKEY_SET:
hkey_lcd_brightness(h, HKEY_SET, &arg);
hkey_lcd_brightness(h, HKEY_SET, &arg);
hkey_sound_mute(h, HKEY_SET, &arg);
hkey_lcd_brightness(handle, HKEY_SET, &brightness);