Timer using Visual C++

/*************Header File****************************/

#include<afxwin.h>

class CMyWnd : public CFrameWnd        // My Window class 

{

public:

CMyWnd();

afx_msg void OnTimer(UINT ID);

DECLARE_MESSAGE_MAP()

};

class CMyApp: public CWinApp          // Application window class

{

public :

BOOL InitInstance();    // initinstace function with Boolian return type

};

/***************Source File**************************/

#include "header.h"        // Include header file

#include <time.h>

CMyWnd :: CMyWnd()

{

Create(NULL,"MyWindow");    // Use of Constructer

}

afx_msg void CMyWnd::OnTimer(UINT ID)

{

    char s[15];

    CClientDC dc (this); 

    CTime t=CTime::GetCurrentTime();

    struct tm *ntime;

    ntime=t.GetLocalTm();

    wsprintf(s,asctime(ntime));

    //AfxMessageBox(s);

    dc.TextOut(250,250,s,strlen(s)-1);

}

BOOL CMyApp :: InitInstance()

{

CMyWnd *c=new CMyWnd();

m_pMainWnd=c;

m_pMainWnd->ShowWindow(SW_SHOW);

m_pMainWnd->SetTimer(10,1000,NULL);

//MessageBox(m_pMainWnd,"hI","hOW R U",1);  //use of message box

return true;

}

BEGIN_MESSAGE_MAP(CMyWnd,CFrameWnd)

ON_WM_TIMER()

END_MESSAGE_MAP()

CMyApp app;