rem: void CommanderLooper::MessageReceived (BMessage *MessagePntr)
add: void ClassificationChoicesWindow::MessageReceived (BMessage *MessagePntr)
context: void CommanderLooper::MessageReceived (BMessage *MessagePntr){  m_IsBusy = true;  if (MessagePntr->what == MSG_COMMAND_ARGUMENTS)    ProcessArgs (MessagePntr);  else if (MessagePntr->what == MSG_COMMAND_FILE_REFS)    ProcessRefs (MessagePntr);  else    BLooper::MessageReceived (MessagePntr);  m_IsBusy = false;}