一个简单的聊天程序

class CMySocket : public CAsyncSocket
{
// Attributes
public:

// Operations
public:
 CMySocket();
 virtual ~CMySocket();

// Overrides
public:
 void SetPar.net(CDialog* pwnd);
 // ClassWizard generated virtual function overrides
 //{{AFX_VIRTUAL(CMySocket)
 public:
 virtual void OnAccept(int nErrorCode);
 virtual void OnConnect(int nErrorCode);
 virtual void OnSend(int nErrorCode);
 virtual void OnReceive(int nErrorCode);
 virtual void OnClose(int nErrorCode);
 //}}AFX_VIRTUAL

 // Generated message map functions
 //{{AFX_MSG(CMySocket)
  // NOTE - the ClassWizard will add and remove member functions here.
 //}}AFX_MSG

// Implementation
protected:
private:
 CDialog* m_pwnd;
};

void CMySocket::OnSend(int nErrorCode)
{

 if(nErrorCode==0)
  ((CInfoDlg*)m_pwnd)->OnSend();

 
 CAsyncSocket::OnSend(nErrorCode);
}

void CMySocket::OnReceive(int nErrorCode)
{

 if(nErrorCode==0)
  ((CInfoDlg*)m_pwnd)->OnReceive();

 
 CAsyncSocket::OnReceive(nErrorCode);
}

void CMySocket::OnClose(int nErrorCode)
{

  if(nErrorCode==0)
  ((CInfoDlg*)m_pwnd)->OnClose();

 
 CAsyncSocket::OnClose(nErrorCode);
}