/*tao 1 cua so khi bam thoat co lua chon yes no */

#include<afxwin.h>

class CMyApp:public CWinApp

{

public:

    BOOL InitInstance();

};

CMyApp theApp;

//khai bao lop cua so

class CMyWin:public CFrameWnd

{

    public:

        CMyWin();

        DECLARE_MESSAGE_MAP();

        afx_msg void OnClose();

};

//xay dung ham tao cua lop cua so

CMyWin::CMyWin()

{

    //tao ra cua so

    Create(NULL,"Pham Phuong Tu");

}

//xay dung ham khoi tao ung dung

BOOL CMyApp::InitInstance()

{

    m_pMainWnd=new CMyWin();//tao ra 1 cua so

    m_pMainWnd->ShowWindow(2);//dat che do hien thi

    m_pMainWnd->UpdateWindow();//ve cua so ra

    return TRUE;

}

BEGIN_MESSAGE_MAP(CMyWin,CFrameWnd)

    ON_WM_CLOSE()

END_MESSAGE_MAP()

afx_msg void CMyWin::OnClose()

{

    int a;

    a= AfxMessageBox("Ban co dong y thoat khong?", MB_YESNO|MB_ICONQUESTION);

    if(a==IDYES)

        DestroyWindow();

}