M_CHANNEL_NEXT
PostMessage(M_CHANNEL_NEXT);
PostMessage(M_CHANNEL_NEXT);
PostMessage(M_CHANNEL_NEXT);
PostMessage(M_CHANNEL_NEXT);
if (dx < -0.1) PostMessage(inv ? M_VOLUME_UP : M_CHANNEL_NEXT);
if (dy < -0.1) PostMessage(inv ? M_CHANNEL_NEXT : M_VOLUME_UP);
case M_CHANNEL_NEXT:
new BMessage(M_CHANNEL_NEXT), '+', B_COMMAND_KEY));