Subscribe
static void Subscribe(const BMessenger &subscriber,
TBarApp::Subscribe(self, &fTeamList);
TBarApp::Subscribe(BMessenger(this), &tmpList);
TBarApp::Subscribe(self, &teamList);
virtual status_t Subscribe(char *name,
status_t Subscribe(char *name,
status_t Subscribe(BBufferStream *stream);
virtual status_t Subscribe(BAbstractBufferStream* stream);