tryreaddirectorychangeswview.h

这个则是一个简单的监视文件系统的例子

// TryReadDirectoryChangesWView.h : interface of the CTryReadDirectoryChangesWView class
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_TRYREADDIRECTORYCHANGESWVIEW_H__284C73E4_5A19_480B_B3B9_0BE3BB3EDC40__INCLUDED_)
#define AFX_TRYREADDIRECTORYCHANGESWVIEW_H__284C73E4_5A19_480B_B3B9_0BE3BB3EDC40__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000


class CTryReadDirectoryChangesWView : public CEditView
{
protected: // create from serialization only
	CTryReadDirectoryChangesWView();
	DECLARE_DYNCREATE(CTryReadDirectoryChangesWView)

// Attributes
public:
	CTryReadDirectoryChangesWDoc* GetDocument();

// Operations
public:

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CTryReadDirectoryChangesWView)
	public:
	virtual void OnDraw(CDC* pDC);  // overridden to draw this view
	virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
	protected:
	//}}AFX_VIRTUAL

// Implementation
public:
	static UINT ReadDirectoryChangesWCompletionRoutine(CTryReadDirectoryChangesWView* pView);
//	static VOID CALLBACK FileIOCompletionRoutine(DWORD dwErrorCode, DWORD dwNumberOfBytesTransfered, LPOVERLAPPED lpOverlapped);
	virtual ~CTryReadDirectoryChangesWView();
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif

protected:
	BOOL m_fIsNT;
	int m_nLineNo;
	CString m_csDir;
	OVERLAPPED m_objOverlapped;
	//	Win2K
	HANDLE m_hDir;
	CHAR m_cBuf[65536];
	DWORD m_dwBytesReturned;
	CRITICAL_SECTION m_objCriticalSection;
	HANDLE m_hEventArray[2];
	int m_nReadTimes;
	//	Win98
	HANDLE m_hVxD;
#ifndef FORDEMO
	DWORD m_dwDir;
#else
	BOOL m_fIsMonitoring;
	DWORD m_nSeqNo;
#endif

// Generated message map functions
protected:
	//{{AFX_MSG(CTryReadDirectoryChangesWView)
	afx_msg void OnEditSelectdirectory();
	afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
	afx_msg void OnDestroy();
	afx_msg void OnUpdateEditSelectdirectory(CCmdUI* pCmdUI);
#ifdef FORDEMO
	afx_msg void OnTimer(UINT nIDEvent);
#endif
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

#ifndef _DEBUG  // debug version in TryReadDirectoryChangesWView.cpp
inline CTryReadDirectoryChangesWDoc* CTryReadDirectoryChangesWView::GetDocument()
   { return (CTryReadDirectoryChangesWDoc*)m_pDocument; }
#endif

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_TRYREADDIRECTORYCHANGESWVIEW_H__284C73E4_5A19_480B_B3B9_0BE3BB3EDC40__INCLUDED_)