lstnsock.h这个头文件有如下不懂的地方

zsww111 2008-07-25 04:29:08

这个文件是网上一个网络编程例子里的,文件内容如下:
// lstnsock.h : interface of the CListeningSocket class
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#ifndef __LSTNSOCK_H__
#define __LSTNSOCK_H__

class CChatServerDoc;

class CListeningSocket : public CSocket
{
DECLARE_DYNAMIC(CListeningSocket);////////////////////////////////////////这里有问题
private:
CListeningSocket(const CListeningSocket& rSrc); // no implementation
void operator=(const CListeningSocket& rSrc); // no implementation

// Construction
public:
CListeningSocket(CChatServerDoc* pDoc);

// Attributes
public:
CChatServerDoc* m_pDoc;

// Overridable callbacks
protected:
virtual void OnAccept(int nErrorCode);

// Implementation
public:
virtual ~CListeningSocket();

#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif
};
#endif // __LSTNSOCK_H__
我尝试自己创建类似的内容,也继承于CSocket,但编译时提示
DECLARE_DYNAMIC(CListeningSocket);//这里出错,提示内容如下:
unresolved external symbol "public: virtual struct CRuntimeClass * __thiscall CListeningSocket::GetRuntimeClass(void)const " (?GetRuntimeClass@CListeningSocket@@UBEPAUCRuntimeClass@@XZ)
请问这个文件是如何派生出的?为什么会出错呢

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Recruitment021 2008-07-28

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帮你转一下，好看点！

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这个文件是网上一个网络编程例子里的,文件内容如下: 

// lstnsock.h : interface of the CListeningSocket class 

// 

// This is a part of the Microsoft Foundation Classes C++ library. 

// Copyright (C) 1992-1998 Microsoft Corporation 

// All rights reserved. 

// 

// This source code is only intended as a supplement to the 

// Microsoft Foundation Classes Reference and related 

// electronic documentation provided with the library. 

// See these sources for detailed information regarding the 

// Microsoft Foundation Classes product. 



#ifndef __LSTNSOCK_H__ 

#define __LSTNSOCK_H__ 



class CChatServerDoc; 



class CListeningSocket : public CSocket 

{ 

DECLARE_DYNAMIC(CListeningSocket);////////////////////////////////////////这里有问题 

private: 

CListeningSocket(const CListeningSocket& rSrc);        // no implementation 

void operator=(const CListeningSocket& rSrc);  // no implementation 



// Construction 

public: 

CListeningSocket(CChatServerDoc* pDoc); 



// Attributes 

public: 

CChatServerDoc* m_pDoc; 



// Overridable callbacks 

protected: 

virtual void OnAccept(int nErrorCode); 



// Implementation 

public: 

virtual ~CListeningSocket(); 



#ifdef _DEBUG 

virtual void AssertValid() const; 

virtual void Dump(CDumpContext& dc) const; 

#endif 

}; 

#endif // __LSTNSOCK_H__ 

我尝试自己创建类似的内容,也继承于CSocket,但编译时提示 

DECLARE_DYNAMIC(CListeningSocket);//这里出错,提示内容如下: 

unresolved external symbol "public: virtual struct CRuntimeClass * __thiscall CListeningSocket::GetRuntimeClass(void)const " (?GetRuntimeClass@CListeningSocket@@UBEPAUCRuntimeClass@@XZ) 

请问这个文件是如何派生出的?为什么会出错呢