如图所示为编程一个基于对话框程序界面，其中进度条已经定义了一个变量m_Progress，并且添加了“开始”按钮的响应函数OnStart()和WM_TIMER的消息响应函数:OnTimer(UINT nIDEvent).为实现如下功能，试编写相应程序代码。
1、    软件起动后，将进度条的范围设置成0到200，步长设成1，起始位置在0位；
2、    按开始按钮后，进度条位置值开始逐渐增加，20秒后过度条到达满值，然后停止。
3、    再次按开始按钮，动作重复

BOOLCTestDlg::OnInitDialog()
{
    CDialog::OnInitDialog();
 
    // Add "About..." menu item tosystem menu.
 
    // IDM_ABOUTBOX must be in the systemcommand range.
    ASSERT((IDM_ABOUTBOX & 0xFFF0) ==IDM_ABOUTBOX);
    ASSERT(IDM_ABOUTBOX < 0xF000);
 
    CMenu* pSysMenu = GetSystemMenu(FALSE);
    if (pSysMenu != NULL)
    {
        CString strAboutMenu;
        strAboutMenu.LoadString(IDS_ABOUTBOX);
        if (!strAboutMenu.IsEmpty())
        {
            pSysMenu->AppendMenu(MF_SEPARATOR);
            pSysMenu->AppendMenu(MF_STRING,IDM_ABOUTBOX, strAboutMenu);
        }
    }
 
    // Set the icon for this dialog.  The framework does this automatically
    // when the application's main window is not a dialog
    SetIcon(m_hIcon, TRUE);         // Set big icon
    SetIcon(m_hIcon, FALSE);        // Set small icon
   
    //TODO: Add extra initialization here




return TRUE;  // return TRUE  unless you set the focus to a control
}
void CTestDlg::OnStart()
{
    // TODO: Add your control notificationhandler code here




voidCTestDlg::OnTimer(UINT nIDEvent)
{
    // TODO: Add your message handler code hereand/or call default




CDialog::OnTimer(nIDEvent);
}

MFC？发错地方了吧，还有你这是作业吧。

发错地方

BOOLCTestDlg::OnInitDialog()
{
    CDialog::OnInitDialog();

    // Add "About..." menu item tosystem menu.

    // IDM_ABOUTBOX must be in the systemcommand range.
    ASSERT((IDM_ABOUTBOX & 0xFFF0) ==IDM_ABOUTBOX);
    ASSERT(IDM_ABOUTBOX < 0xF000);

    CMenu* pSysMenu = GetSystemMenu(FALSE);
    if (pSysMenu != NULL)
    {
        CString strAboutMenu;
        strAboutMenu.LoadString(IDS_ABOUTBOX);
        if (!strAboutMenu.IsEmpty())
        {
            pSysMenu->AppendMenu(MF_SEPARATOR);
            pSysMenu->AppendMenu(MF_STRING,IDM_ABOUTBOX, strAboutMenu);
        }
    }

    // Set the icon for this dialog.  The framework does this automatically
    // when the application's main window is not a dialog
    SetIcon(m_hIcon, TRUE);         // Set big icon
    SetIcon(m_hIcon, FALSE);        // Set small icon
   
    //TODO: Add extra initialization here
     SetTimer(0,100,NULL);//设置定时器定时时间为100ms



return TRUE;  // return TRUE  unless you set the focus to a control
}
void CTestDlg::OnStart()
{
    // TODO: Add your control notificationhandler code here
   m_Progress.SetRange(0,200);//范围为0-200
    m_Progress.SetPos(0);//初始位置为0



voidCTestDlg::OnTimer(UINT nIDEvent)
{
    // TODO: Add your message handler code hereand/or call default
   m_Progress.SetStep(1);//每100ms前进一步，20S走完200步



CDialog::OnTimer(nIDEvent);
}