PARAM_DST
static_cast<int32 *>(value)[0] = input->HasInputChannelDestination(PARAM_CHAN(id), PARAM_DST(id));
int oldchan = input->GetInputChannelForDestination(PARAM_DST(id));
input->RemoveInputChannelDestination(oldchan, PARAM_DST(id));
BroadcastNewParameterValue(when, PARAM_DST_ENABLE(PARAM(id), oldchan, PARAM_DST(id)), &null, sizeof(null));
input->AddInputChannelDestination(PARAM_CHAN(id), PARAM_DST(id));
input->RemoveInputChannelDestination(PARAM_CHAN(id), PARAM_DST(id));