我的C++代码

#include <afxwin.h>
#include "MCFWindow.h"
CMFCApp mfcApp;
BOOL CMFCApp::InitInstance()
{
        m_pMainWnd = new CMFCWindow();
        m_pMainWnd->ShowWindow(m_nCmdShow);
        m_pMainWnd->UpdateWindow();
         return TRUE;

}

BEGIN_MESSAGE_MAP(CMFCWindow,CFrameWnd)
ON_WM_PAINT()
END_MESSAGE_MAP()

CMFCWindow::CMFCWindow()
{
        Create();
}

void CMFCWindow::OnPaint()
{
        CPaintDC dc( this);
        CRect rect;
        GetClientRect(&rect);
        dc.DrawText(_T(),-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);
}