怎样添加鼠标消息？

// c++drawDlg.cpp : 实现文件
//

#include "stdafx.h"
#include "c++draw.h"
#include "c++drawDlg.h"
#include <string>
using namespace std;
#ifdef _DEBUG
#define new DEBUG_NEW
#endif

// 用于应用程序“关于”菜单项的 CAboutDlg 对话框

class CAboutDlg : public CDialog
{
public:
CAboutDlg();

// 对话框数据
enum { IDD = IDD_ABOUTBOX };

protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持

// 实现
protected:
DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()

// CcdrawDlg 对话框

CcdrawDlg::CcdrawDlg(CWnd* pParent /*=NULL*/)
: CDialog(CcdrawDlg::IDD, pParent)