自学教程：C++ GetSystemMenu函数代码示例

CConsole::CConsole() : m_OwnConsole(false) {	if (!AllocConsole()) return;	SetConsoleCtrlHandler(MyConsoleCtrlHandler, TRUE);	RemoveMenu(GetSystemMenu(GetConsoleWindow(), FALSE), SC_CLOSE, MF_BYCOMMAND);	const int in = _open_osfhandle(INT_PTR(GetStdHandle(STD_INPUT_HANDLE)), _O_TEXT);	const int out = _open_osfhandle(INT_PTR(GetStdHandle(STD_OUTPUT_HANDLE)), _O_TEXT);	m_OldStdin = *stdin;	m_OldStdout = *stdout;	*stdin = *_fdopen(in, "r");	*stdout = *_fdopen(out, "w");	m_OwnConsole = true;}

/* * Add the default or a custom menu depending on the class match */voidSetupSysMenu(unsigned long hwndIn){    HWND hwnd;    HMENU sys;    int i;    WindowPtr pWin;    char *res_name, *res_class;    hwnd = (HWND) hwndIn;    if (!hwnd)        return;    pWin = GetProp(hwnd, WIN_WINDOW_PROP);    sys = GetSystemMenu(hwnd, FALSE);    if (!sys)        return;    if (pWin) {        /* First see if there's a class match... */        if (winMultiWindowGetClassHint(pWin, &res_name, &res_class)) {            for (i = 0; i < pref.sysMenuItems; i++) {                if (!strcmp(pref.sysMenu[i].match, res_name) ||                    !strcmp(pref.sysMenu[i].match, res_class)) {                    free(res_name);                    free(res_class);                    MakeMenu(pref.sysMenu[i].menuName, sys,                             pref.sysMenu[i].menuPos == AT_START ? 0 : -1);                    return;                }            }            /* No match, just free alloc'd strings */            free(res_name);            free(res_class);        }                       /* Found wm_class */    }                           /* if pwin */    /* Fallback to system default */    if (pref.defaultSysMenuName[0]) {        if (pref.defaultSysMenuPos == AT_START)            MakeMenu(pref.defaultSysMenuName, sys, 0);        else            MakeMenu(pref.defaultSysMenuName, sys, -1);    }}

static int windowsInit( HINSTANCE hinstance ){    WNDCLASS  		wc;						/* Window class */    HMENU			hSysMenu;    emfInstSet( ( int ) hinstance );    wc.style		 = CS_HREDRAW | CS_VREDRAW;    wc.hbrBackground = ( HBRUSH )( COLOR_WINDOW + 1 );    wc.hCursor		 = LoadCursor( NULL, IDC_ARROW );    wc.cbClsExtra	 = 0;    wc.cbWndExtra	 = 0;    wc.hInstance	 = hinstance;    wc.hIcon		 = NULL;    wc.lpfnWndProc	 = ( WNDPROC ) websWindProc;    wc.lpszMenuName	 = wc.lpszClassName = name;    if ( ! RegisterClass( &wc ) )    {        return -1;    }    /*     *	Create a window just so we can have a taskbar to close this web server     */    hwnd = CreateWindow( name, title, WS_MINIMIZE | WS_POPUPWINDOW,                         CW_USEDEFAULT, 0, 0, 0, NULL, NULL, hinstance, NULL );    if ( hwnd == NULL )    {        return -1;    }    /*     *	Add the about box menu item to the system menu     *	a_assert: IDM_ABOUTBOX must be in the system command range.     */    hSysMenu = GetSystemMenu( hwnd, FALSE );    if ( hSysMenu != NULL )    {        AppendMenu( hSysMenu, MF_SEPARATOR, 0, NULL );        AppendMenu( hSysMenu, MF_STRING, IDM_ABOUTBOX, T( "About WebServer" ) );    }    ShowWindow( hwnd, SW_SHOWNORMAL );    UpdateWindow( hwnd );    hwndAbout = NULL;    return 0;}

BOOL CTranslateDlg::OnInitDialog(){   CDialogEx::OnInitDialog();   // Add "About..." menu item to system menu.   // IDM_ABOUTBOX must be in the system command range.   ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);   ASSERT(IDM_ABOUTBOX < 0xF000);   CMenu* pSysMenu = GetSystemMenu(FALSE);   if (pSysMenu != NULL)   {      BOOL bNameValid;      CString strAboutMenu;      bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);      ASSERT(bNameValid);      if (!strAboutMenu.IsEmpty())      {         pSysMenu->AppendMenu(MF_SEPARATOR);         pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);      }   }   // Set the icon for this dialog.  The framework does this automatically   //  when the application's main window is not a dialog   SetIcon(m_hIcon, TRUE);			// Set big icon   SetIcon(m_hIcon, FALSE);		// Set small icon   // TODO: Add extra initialization here   CStringArray sLanguages;   m_cTranslator.GetAllLanguages(sLanguages);   int count = sLanguages.GetCount();   for (int i = 0 ; i < count; i++)      m_cToLang.AddString(sLanguages.GetAt(i));   if(count)      m_cToLang.SelectString(0, _T("Kannada"));   m_font.CreateFont(30, 0, 0, 0, FW_DEMIBOLD, FALSE, FALSE, 0, DEFAULT_CHARSET, 0, 0, 0, 0, NULL);   m_cTranslatedText.SetFont(&m_font,TRUE);   m_Errorfont.CreateFont(20, 0, 0, 0, FW_NORMAL, TRUE, FALSE, 0, DEFAULT_CHARSET, 0, 0, 0, 0, NULL);   m_cErrorText.SetFont(&m_Errorfont,TRUE);   return TRUE;  // return TRUE  unless you set the focus to a control}

BOOL DFUSheet::OnInitDialog() {	// Pass on to the base class first	BOOL result = CPropertySheet::OnInitDialog();		// Modified behaviour for development mode	if (developmentMode)	{		// Add a minimize icon		ModifyStyle(0, WS_MINIMIZEBOX, 0);		GetSystemMenu(false)->AppendMenu(MF_STRING, SC_MINIMIZE, _T("Minimize"));	}		// Return the result	return result;}

void TaskBar::ShowAppSystemMenu(TaskBarMap::iterator it){	HMENU hmenu = GetSystemMenu(it->first, FALSE);	if (hmenu) {		POINT pt;		GetCursorPos(&pt);		int cmd = TrackPopupMenu(hmenu, TPM_LEFTBUTTON|TPM_RIGHTBUTTON|TPM_RETURNCMD, pt.x, pt.y, 0, _hwnd, NULL);		if (cmd) {			ActivateApp(it, false, false);	// reactivate window after the context menu has closed			PostMessage(it->first, WM_SYSCOMMAND, cmd, 0);		}	}}

void CMainFrame::OnClose() {	if(m_pApp->m_iCurrentTasks>0)	{		AfxMessageBox("You have " + str(m_pApp->m_iCurrentTasks)+ " job(s) pending completion. Please wait for this to finish before closing.");	}	else	{		//disable close system menu.		CMenu* pmenu = GetSystemMenu(FALSE);		UINT size = pmenu->GetMenuItemCount( );		pmenu->EnableMenuItem(pmenu->GetMenuItemID(6), MF_DISABLED | MF_GRAYED);		DrawMenuBar();		//instead of the 2 phase shutdown, i'm		//just gonna risk leaking a little memory 		//and simplify the code. markme saw a crash here.		m_pApp->Terminate();				//close the frame.		CMDIFrameWnd::OnClose();		//ALERT. Unusual code.		//This is a 2phase shutdown to ensure we don't leak any memory due to floating msgs coming		//in from the server.		/*if(m_ShutDownPhase==0)		{			if(E_FAIL==m_pApp->Terminate())			{				//Terminate's already happened. Shutdown now.				m_ShutDownPhase = 0;				CMDIFrameWnd::OnClose();				return;			}			m_ShutDownPhase=-23; //number same as below. number not used anywhere else.			PostMessage(WM_CLOSE);		}		else if(m_ShutDownPhase==-23) //see number above.		{			m_ShutDownPhase = 0;			CMDIFrameWnd::OnClose();		}		else			ASSERT(0);		*/	}}

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct){    if (CFrameWnd::OnCreate(lpCreateStruct) == -1)        return -1;        if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP        | CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||        !m_wndToolBar.LoadToolBar(IDR_MAINFRAME))    {        TRACE0("Failed to create toolbar/n");        return -1;      // fail to create    }    if (!m_wndStatusBar.Create(this) ||        !m_wndStatusBar.SetIndicators(indicators,          sizeof(indicators)/sizeof(UINT)))    {        TRACE0("Failed to create status bar/n");        return -1;      // fail to create    }    // TODO: Delete these three lines if you don't want the toolbar to    //  be dockable    m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);    EnableDocking(CBRS_ALIGN_ANY);    DockControlBar(&m_wndToolBar);    m_wndToolBar.ShowWindow(SW_HIDE);    m_wndStatusBar.ShowWindow(SW_HIDE);    this->SetMenu(0);    ASSERT((ID_APP_ABOUT & 0xFFF0) == ID_APP_ABOUT);    ASSERT(ID_APP_ABOUT < 0xF000);    CMenu* pSysMenu = GetSystemMenu(FALSE);    if (pSysMenu != NULL)    {        CString strAboutMenu("
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