MFC-4简单的窗口重绘（非部分重绘）

#include <afxwin.h>
#include "resource.h"
#include <afxtempl.h>   //定义模板类的头文件

class MyDocument : public CDocument
{
public:
	CArray<CPoint,CPoint &> pArray;//<保存的数据类型,读取保存数据类型的返回值>
	void AddPoint(CPoint p)
	{
		pArray.Add(p);
	}
	CPoint GetPoint(int i)
	{
		return pArray[i];
	}
	int GetSize()
	{
		return pArray.GetSize();
	}
	DECLARE_DYNCREATE(MyDocument)//声明run-time类
	DECLARE_MESSAGE_MAP()
};

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

class MyView : public CView
{
public:
	void OnDraw(CDC * aDC)//必须重载的虚函数，重绘函数
	{
		MyDocument *doc = (MyDocument *)GetDocument();//取得当前Document的指针
		int num = doc->GetSize();
		int i;
		for(i=0;i<num;++i)
		{
			CPoint point = doc->GetPoint(i);
			aDC->SetPixel(point,RGB(255,0,0));
		}
	}

	afx_msg void OnLButtonDown(UINT,CPoint point)
	{
		SetCapture();//取得鼠标消息的接收权
	}

	afx_msg void OnMouseMove(UINT,CPoint point)
	{
		if(this == GetCapture())
		{
			CClientDC aDC(this);//建立画布
			aDC.SetPixel(point,RGB(255,0,0));
			MyDocument *doc = (MyDocument *)GetDocument();
			doc->AddPoint(point);
		}
	}

	afx_msg void OnLButtonUp(UINT,CPoint point)
	{
		::ReleaseCapture();
	}

	DECLARE_MESSAGE_MAP()
	DECLARE_DYNCREATE(MyView)//声明为run-time类
};

BEGIN_MESSAGE_MAP(MyView,CView)
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONUP()
END_MESSAGE_MAP()

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

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

BEGIN_MESSAGE_MAP(MyFrame,CFrameWnd)
END_MESSAGE_MAP()

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