MFC之Hello World

#pragma once
#include <afxwin.h>
class CMyApp :public CWinApp
{
	BOOL InitInstance();
};

class CMainWnd :public CFrameWnd
{
public:
	CMainWnd();
protected:
	afx_msg void OnPaint();
	DECLARE_MESSAGE_MAP()
};

#include <afxwin.h>
#include "Hello.h"

CMyApp myApp;
BOOL CMyApp::InitInstance()
{
	m_pMainWnd = new CMainWnd;
	m_pMainWnd->ShowWindow(m_nCmdShow);
	m_pMainWnd->UpdateWindow();
	return TRUE;
}

BEGIN_MESSAGE_MAP(CMainWnd,CFrameWnd)
	ON_WM_PAINT()
END_MESSAGE_MAP()

CMainWnd::CMainWnd()
{
	Create(NULL, _T("Hello, MFC"));
}

void CMainWnd::OnPaint()
{
	CPaintDC dc(this);
	CRect rect;
	GetClientRect(&rect);
	dc.DrawText("Hello World", &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
}