MFC-3文档视图架构

#include <afxwin.h>
#include "resource.h"

class MyDocument : public CDocument
{
	DECLARE_DYNCREATE(MyDocument)//声明run-time类
};

IMPLEMENT_DYNCREATE(MyDocument,CDocument)//声明MyDocument为run-time类

class MyView : public CView
{
public:
	void OnDraw(CDC * aDC)//必须重载的虚函数
	{}
	DECLARE_DYNCREATE(MyView)//声明为run-time类
};

IMPLEMENT_DYNCREATE(MyView,CView)//声明MyView为run-time类

class MyFrame:public CFrameWnd
{
	DECLARE_DYNCREATE(MyFrame)//声明run-time类
};

IMPLEMENT_DYNCREATE(MyFrame,CFrameWnd)//声明MyFrame为run-time类

class MyApp:public CWinApp
{
public:
	BOOL InitInstance()
	{
		CDocument *doc;//指向文件的指针
		CSingleDocTemplate * DocTemplate;//文件指向单文档模板对象的指针
		DocTemplate = new CSingleDocTemplate(
			IDR_MENU1,//用于单文档框架之资源标志符
			RUNTIME_CLASS(MyDocument),//单文档窗口的Document类
			RUNTIME_CLASS(MyFrame),//单文档窗口的窗口框架类
			RUNTIME_CLASS(MyView)//单文档窗口的View类
			);//建立单文档模板对象

		AddDocTemplate(DocTemplate);//将单文档模板对象设置给MyApp;

		doc = DocTemplate->CreateNewDocument();//建立一个新的文档

		m_pMainWnd = DocTemplate->CreateNewFrame(doc,NULL);//建立一个窗口框架

		DocTemplate->InitialUpdateFrame((CFrameWnd*)m_pMainWnd,doc);//初始化窗口框架并连接view

		m_pMainWnd->ShowWindow(SW_SHOW);//显示窗口
		return true;
	}
} a_app;//建立应用程序对象