MFC学习笔记三

MFC类层次结构

//------------------------------------------------------------------// MFC.H //------------------------------------------------------------------#include <iostream>using namespace std;class CObject{public:CObject::CObject() {cout<<"CObject Constructor"<< endl;}CObject::~CObject() {cout<<"CObject Destructor"<< endl;}};class CCmdTarget : public CObject{public:CCmdTarget::CCmdTarget() {cout<<"CCmdTarget Constructor"<< endl;}CCmdTarget::~CCmdTarget() {cout<<"CCmdTarget Destructor"<< endl;}};class CWinThread : public CCmdTarget{public:CWinThread::CWinThread() {cout<<"CWinThread Constructor"<< endl;}CWinThread::~CWinThread() {cout<<"CWinThread Destructor"<< endl;}};class CWinApp : public CWinThread{public:CWinApp::CWinApp() { m_pCurrentWinApp = this; cout<<"CWinApp Constructor"<< endl;}CWinApp::~CWinApp() {cout<<"CWinApp Destructor"<< endl;}public:CWinApp* m_pCurrentWinApp;};class CDocument : public CCmdTarget{public:CDocument::CDocument() {cout<<"CDocument Constructor"<< endl;}CDocument::~CDocument() {cout<<"CDocument Destructor"<< endl;}};class CWnd : public CCmdTarget{public:CWnd::CWnd() {cout<<"CWnd Constructor"<< endl;}CWnd::~CWnd() {cout<<"CWnd Destructor"<< endl;}};class CFrameWnd : public CWnd{public:CFrameWnd::CFrameWnd() {cout<<"CFrameWnd Constructor"<< endl;}CFrameWnd::~CFrameWnd() {cout<<"CFrameWnd Destructor"<< endl;}};class CView : public CWnd{public:CView::CView() {cout<<"CView Constructor"<< endl;}CView::~CView() {cout<<"CView Destructor"<< endl;}};// global functionCWinApp* AfxGetApp();//------------------------------------------------------------------// MY.H //------------------------------------------------------------------#include <iostream>#include "MFC.h"class CMyWinApp : public CWinApp{public:CMyWinApp::CMyWinApp() { cout<<"CMyWinApp Constructor"<< endl;}CMyWinApp::~CMyWinApp() {cout<<"CMyWinApp Destructor"<< endl;}};class CMyFrameWnd : public CFrameWnd{public:CMyFrameWnd::CMyFrameWnd() {cout<<"CMyFrameWnd Constructor"<< endl;}CMyFrameWnd::~CMyFrameWnd() {cout<<"CMyFrameWnd Destructor"<< endl;}};//------------------------------------------------------------------// MFC.CPP //------------------------------------------------------------------#include "MY.h"extern CMyWinApp theApp;CWinApp* AfxGetApp(){return theApp.m_pCurrentWinApp;}//------------------------------------------------------------------// MY.CPP //------------------------------------------------------------------#include "MY.h"CMyWinApp theApp; // global objectvoid main(){CWinApp* pApp = AfxGetApp();}