#include<afxwin.h>

class CMyApp : public CWinApp

{

public:

    BOOL InitInstance();

};

class CMyWin : public CFrameWnd

{

public:

    CMyWin();

    afx_msg void OnPaint();

    DECLARE_MESSAGE_MAP()

};

CMyApp theApp;

BOOL CMyApp::InitInstance()

{

    m_pMainWnd=new CMyWin;

    m_pMainWnd->ShowWindow(m_nCmdShow);

    m_pMainWnd->UpdateWindow();

    return true;

}

BEGIN_MESSAGE_MAP(CMyWin,CFrameWnd)

    ON_WM_PAINT()

END_MESSAGE_MAP()

CMyWin::CMyWin()

{

    Create(NULL,"Nguyen Dai Duong - 08B1");

}

afx_msg void CMyWin::OnPaint()

{

        RECT r;

        CDC *dc=GetDC();

        PAINTSTRUCT ps;

        int xt,yt,h,w, a, b;

        a=r.bottom-r.top;

        b=r.right-r.left;

        xt=b/2;yt=a/2;

        dc->Rectangle(-1, -1, b+1, a+1);

        GetClientRect(&r);

        h=r.bottom-r.top;

        w=r.right-r.left;

        xt=w/2;yt=h/2;

        BeginPaint(&ps);

        dc->Rectangle(xt-h/3,yt-h/3,xt+h/3,yt+h/3);

        EndPaint(&ps);

}