Fast Track Visual C++ 6.0 Programming
(Publisher: John Wiley & Sons, Inc.)
Author(s): Steve Holzner
ISBN: 0471312908
Publication Date: 09/01/98

Listing 10.5 CounterView.h and CounterView.cpp

// CounterView.h : interface of the CCounterView class
//
/////////////////////////////////////////////////////////////////////////////

#if
!defined(AFX_COUNTERVIEW_H__A45E4A83_A79A_11D1_887F_D42B07C10710__INCLUDED_)
#define AFX_COUNTERVIEW_H__A45E4A83_A79A_11D1_887F_D42B07C10710__INCLUDED_

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

class CCounterView : public CView
{
protected: // create from serialization only
    CCounterView();
    DECLARE_DYNCREATE(CCounterView)

// Attributes
public:
    CCounterDoc* GetDocument();

// Operations
public:

// Overrides
    // ClassWizard generated virtual function overrides
    //{{AFX_VIRTUAL(CCounterView)
    public:
    virtual void OnDraw(CDC* pDC);  // overridden to draw this view
    virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
    protected:
    virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
    virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
    virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
    //}}AFX_VIRTUAL

// Implementation
public:
    virtual ~CCounterView();
#ifdef _DEBUG
    virtual void AssertValid() const;
    virtual void Dump(CDumpContext& dc) const;
#endif

protected:

// Generated message map functions
protected:
    //{{AFX_MSG(CCounterView)
    afx_msg void OnFileIncrementcounter();
    //}}AFX_MSG
    DECLARE_MESSAGE_MAP()
};

#ifndef _DEBUG  // debug version in CounterView.cpp
inline CCounterDoc* CCounterView::GetDocument()
   { return (CCounterDoc*)m_pDocument; }
)

#endif

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

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

#endif // !defined(AFX_COUNTERVIEW_H__A45E4A83_A79A_11D1_887F_D42B07C10710__INCLUDED_)


// CounterView.cpp : implementation of the CCounterView class
//

#include “stdafx.h”
#include “Counter.h”

#include “CounterDoc.h”
#include “CounterView.h”
#include “CounterDLL.h”

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CCounterView

IMPLEMENT_DYNCREATE(CCounterView, CView)

BEGIN_MESSAGE_MAP(CCounterView, CView)
    //{{AFX_MSG_MAP(CCounterView)
    ON_COMMAND(ID_FILE_INCREMENTCOUNTER, OnFileIncrementcounter)
    //}}AFX_MSG_MAP
    // Standard printing commands
    ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)

    ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
    ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCounterView construction/destruction

CCounterView::CCounterView()
{
    // TODO: add construction code here

}

CCounterView::~CCounterView()
{
}

BOOL CCounterView::PreCreateWindow(CREATESTRUCT& cs)
{
    // TODO: Modify the Window class or styles here by modifying
    //  the CREATESTRUCT cs

    return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CCounterView drawing

void CCounterView::OnDraw(CDC* pDC)
{
    CCounterDoc* pDoc = GetDocument();
    ASSERT_VALID(pDoc);

    // TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CCounterView printing

BOOL CCounterView::OnPreparePrinting(CPrintInfo* pInfo)

{
    // default preparation
    return DoPreparePrinting(pInfo);
}

void CCounterView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
    // TODO: add extra initialization before printing
}

void CCounterView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
    // TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CCounterView diagnostics

#ifdef _DEBUG
void CCounterView::AssertValid() const
{
    CView::AssertValid();
}

void CCounterView::Dump(CDumpContext& dc) const
{
    CView::Dump(dc);
}

CCounterDoc* CCounterView::GetDocument() // non-debug version is inline
{
    ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CCounterDoc)));
    return (CCounterDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CCounterView message handlers

void CCounterView::OnFileIncrementcounter()

{
    // TODO: Add your command handler code here
    IncrementCounter();
}

What’s Ahead

In the next chapter, we use one of the most powerful of all Windows programming constructs—Windows hooks. With a hook, you can read keystrokes, mouse actions, or other events even before the process they are targeted for does. Working behind the scenes in this way gives you a lot of advantages.