// CMFCDemoDlg 对话框

class CMFCDemoDlg : public CDialogEx

{

// 构造

public:

    CMFCDemoDlg(CWnd* pParent = NULL);    // 标准构造函数

// 对话框数据

    enum { IDD = IDD_MFCDEMO_DIALOG };

    protected:

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

protected:

    CRect m_rect;

    void ChangeSize(UINT nID,int x,int y);

    void ReSize(void);

    POINT old;

protected:

    // 生成的消息映射函数

    virtual BOOL OnInitDialog();

    afx_msg void OnSize(UINT nType, int cx, int cy);

    DECLARE_MESSAGE_MAP()

};

CMFCDemoDlg::CMFCDemoDlg(CWnd* pParent /*=NULL*/)

    : CDialogEx(CMFCDemoDlg::IDD, pParent)

{

    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

}

void CMFCDemoDlg::DoDataExchange(CDataExchange* pDX)

{

    CDialogEx::DoDataExchange(pDX);

}

BEGIN_MESSAGE_MAP(CMFCDemoDlg, CDialogEx)

    ON_WM_SIZE()

END_MESSAGE_MAP()

// CMFCDemoDlg 消息处理程序

BOOL CMFCDemoDlg::OnInitDialog()

{

    CDialogEx::OnInitDialog();

    // 获取对话框初始大小

    GetClientRect(&m_rect);  //获取对话框的大小

    old.x=m_rect.right-m_rect.left;

    old.y=m_rect.bottom-m_rect.top;

    return TRUE;

}

void CMFCDemoDlg::ReSize(void)

{

    float fsp[];

    POINT Newp; //获取现在对话框的大小

    CRect recta;

    GetClientRect(&recta);     //取客户区大小

    Newp.x=recta.right-recta.left;

    Newp.y=recta.bottom-recta.top;

    fsp[]=(float)Newp.x/old.x;

    fsp[]=(float)Newp.y/old.y;

    CRect Rect;

    int woc;

    CPoint OldTLPoint,TLPoint; //左上角

    CPoint OldBRPoint,BRPoint; //右下角

    HWND  hwndChild=::GetWindow(m_hWnd,GW_CHILD);  //列出所有控件

    while(hwndChild){

        woc=::GetDlgCtrlID(hwndChild);//取得ID

        GetDlgItem(woc)->GetWindowRect(Rect);

        ScreenToClient(Rect);

        OldTLPoint = Rect.TopLeft();

        TLPoint.x = long(OldTLPoint.x*fsp[]);

        TLPoint.y = long(OldTLPoint.y*fsp[]);

        OldBRPoint = Rect.BottomRight();

        BRPoint.x = long(OldBRPoint.x *fsp[]);

        BRPoint.y = long(OldBRPoint.y *fsp[]);

        Rect.SetRect(TLPoint,BRPoint);

        GetDlgItem(woc)->MoveWindow(Rect,TRUE);

        hwndChild=::GetWindow(hwndChild, GW_HWNDNEXT);

    }

    old=Newp;

}  

void CMFCDemoDlg::OnSize(UINT nType, int cx, int cy)

{

    CDialogEx::OnSize(nType,cx,cy);

    if(nType!=SIZE_MINIMIZED )  //判断窗口是不是最小化了，因为窗口最小化之后 ，窗口的长和宽会变成0，当前一次变化的时就会出现除以0的错误操作

    {

        ReSize();

    }

}

//change control size

void CMFCDemoDlg::ChangeSize(UINT nID,int x,int y)

{

    CWnd *pWnd = GetDlgItem(nID);

    if(pWnd!=NULL)

    {

        CRect rec;

        pWnd->GetWindowRect(&rec);//获取控件变化前的大小

        ScreenToClient(rec);   //将控件大小装换位在对话框中的区域坐标

        // x / m_rect.Width(); 伸缩rate

        rec.left = rec.left * x / m_rect.Width();

        rec.top = rec.top * y / m_rect.Height();

        rec.bottom = rec.bottom  * y / m_rect.Height();

        rec.right = rec.right * x / m_rect.Width();

        pWnd->MoveWindow(rec);//伸缩控件

    }

}