聊天分頻道擷取，m_pComboBox的應用

void CAT_ChatViewDlg:: OnCbnSelchangeChannel(){  m_listMst.ResetContent();  switch(m_pComboBox.GetCurSel()){    case 0:      {     for (int i= 0; i<m_pMapList->count;i++)      {         char *pStr = (char*)m_pMapList->Items[i];         m_listMsg.AddString(pStr);       } }breal;} LRESULT CAT_ChatViewDlg::OnRecvPacket(WPARAM wParam,LPARAM lparam){    Packet* pPacket = (Packet*)wParam;   int  nIndex = (int)lParam;   SET_DATA(pMsgPacket,ACCOUNT,GAME_CHATMSG,pPacket);    if(nIndex>=m_pListServers->Count)     return 0 ;  CGameServer* pServer =(CGameServer*)m_pListServers->Items[nIndex];   ^^  switch(pMsgPacket->dwChannel){  case 0; //ditu  {   char * pStr = strdup(strTmp.GetBuffer());m_pMapList ->Add(pStr);  if(m_pMapList->Count>1000){  char * pchar = (char*) m_pMapList->Delete(0);free(pchar);} strTmp.ReleaseBuffer();break;}