MFC窗口函数讲解

Windows 程序入口点: WinMain
控制台程序入口点 : main
dll入口点 :DllMain

MFC入口点函数：InitInstance()

重写 Dlg 对话框中的WindowProc 函数进行消息拦截

debug--window--call satck 调用函数栈,也就是函数的调用栈

 

C多线程Dlg::C多线程Dlg(CWnd* pParent /*=NULL*/)
    : CDialog(C多线程Dlg::IDD, pParent)//构造函数
{
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void C多线程Dlg::DoDataExchange(CDataExchange* pDX)//控件变量都声明在这里
{
    CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(C多线程Dlg, CDialog)//消息映射列表
    ON_WM_SYSCOMMAND()
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    ON_BN_CLICKED(IDOK, &C多线程Dlg::OnBnClickedOk)
END_MESSAGE_MAP()


BOOL C多线程Dlg::OnInitDialog()//初始化对话框的函数
{
    CDialog::OnInitDialog();//调用父类的方法进行对话框初始化

    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);
        }
    }

    SetIcon(m_hIcon, TRUE);            // 设置大图标
    SetIcon(m_hIcon, FALSE);        // 设置小图标


    return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE
}

void C多线程Dlg::OnSysCommand(UINT nID, LPARAM lParam)//单击系统菜单项的时候会发送这个命令给函数
{
    if ((nID & 0xFFF0) == IDM_ABOUTBOX)
    {
        CAboutDlg dlgAbout;
        dlgAbout.DoModal();
    }
    else
    {
        CDialog::OnSysCommand(nID, lParam);
    }
}

void C多线程Dlg::OnPaint()//画东西的函数
{
    if (IsIconic())
    {
        CPaintDC dc(this); // 用于绘制的设备上下文

        SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

        // 使图标在工作区矩形中居中
        int cxIcon = GetSystemMetrics(SM_CXICON);
        int cyIcon = GetSystemMetrics(SM_CYICON);
        CRect rect;
        GetClientRect(&rect);
        int x = (rect.Width() - cxIcon + 1) / 2;
        int y = (rect.Height() - cyIcon + 1) / 2;

        // 绘制图标
        dc.DrawIcon(x, y, m_hIcon);
    }
    else
    {
        CDialog::OnPaint();
    }
}