#include <afxwin.h>    class CMyApp:public CWinApp  {  public:      virtual BOOL InitInstance();  };    //CMainWindow  class CMainWindow:public CWnd  {  public:      CMainWindow();      ~CMainWindow();    protected:      afx_msg void OnNcDestroy( );      afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);      afx_msg void OnDestroy( );      DECLARE_MESSAGE_MAP()  };

#include "ReadBMP.h"  #include "resource.h"    CMyApp theApp;  BOOL CMyApp::InitInstance()  {      m_pMainWnd = new CMainWindow;      m_pMainWnd->ShowWindow(m_nCmdShow);      return TRUE; //必须返回TRUE,否则不会进入消息循环，界面会直接退出  }    //CMainWindow  BEGIN_MESSAGE_MAP(CMainWindow, CWnd)  ON_WM_CREATE()  END_MESSAGE_MAP()  //构造函数  CMainWindow::CMainWindow()  {      LPCTSTR lpszClassName = ::AfxRegisterWndClass(CS_HREDRAW|CS_VREDRAW, ::LoadCursorA(NULL, IDC_ARROW), (HBRUSH)(COLOR_3DFACE+1), theApp.LoadIcon(IDI_MAIN));      CreateEx(WS_EX_CLIENTEDGE, lpszClassName, "xxx", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL);  }  //析构函数  CMainWindow::~CMainWindow()  {    }  //消息映射函数  int CMainWindow::OnCreate(LPCREATESTRUCT lpCreateStruct)  {      //OutputDebugString("oncreate");      //设置菜单      HMENU hMenu = ::LoadMenuA(theApp.m_hInstance, (LPCSTR)IDR_MENU);      ::SetMenu(m_hWnd, hMenu);      return 0;  }    void CMainWindow::OnNcDestroy( )  {      delete this;  }  void CMainWindow::OnDestroy()  {        }