EVT_MENU(BackgroundSupervisor::MSG_BACKGROUND_SUPERVISOR_ADD, BackgroundProcessingDocument::OnAddBackground)
EVT_MENU(BackgroundSupervisor::MSG_BACKGROUND_SUPERVISOR_REMOVE, BackgroundProcessingDocument::OnRemoveBackground)
EVT_MENU(BackgroundSupervisor::MSG_BACKGROUND_SUPERVISOR_ADD, BackgroundProcessingDocument::OnAddBackground)
EVT_MENU(BackgroundSupervisor::MSG_BACKGROUND_SUPERVISOR_REMOVE, BackgroundProcessingDocument::OnRemoveBackground)