一段小代码:
//**********Hello.h***********
#pragma once
#include "afxwin.h"
class CMyApp :
public CWinApp
{
public:
CMyApp(void);
~CMyApp(void);
virtual BOOL InitInstance();
};
class CMainWindow :
public CFrameWnd
{
public:
CMainWindow(void);
~CMainWindow(void);
protected:
afx_msg void OnPaint();
DECLARE_MESSAGE_MAP();
}
//************Hello.cpp************
#include <afxwin.h>
#include ".\hello.h"
CMyApp myApp;
CMyApp::CMyApp(void)
{
}
CMyApp::~CMyApp(void)
{
}
CMainWindow::CMainWindow(void)
{
Create(NULL , _T("The Hello Application"));
}
CMainWindow::~CMainWindow(void)
{
}
BOOL CMyApp::InitInstance()
{
m_pMainWnd = new CMainWindow;
m_pMainWnd->ShowWindow(m_nCmdShow);
m_pMainWnd->UpdateWindow();
return TRUE;
}
BEGIN_MESSAGE_MAP(CMainWindow , CFrameWnd)
ON_WM_PAINT()
END_MESSAGE_MAP()
void CMainWindow::OnPaint()
{
CPaintDC dc(this);
CRect rect;
GetClientRect(&rect);
dc.DrawText(_T("Hello World") , -1 , &rect , DT_SINGLELINE|DT_CENTER|DT_VCENTER);
}
问题是:对于m_pMainWnd用不用delete呢?