商业编程-源码-创建互斥名的完整例子.zip

// desktopsDlg.cpp : implementation file // #include "stdafx.h" #include "desktops.h" #include "desktopsDlg.h" #include "exclusion.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CAboutDlg dialog used for App About class CAboutDlg : public CDialog { public: CAboutDlg(); // Dialog Data //{{AFX_DATA(CAboutDlg) enum { IDD = IDD_ABOUTBOX }; //}}AFX_DATA // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CAboutDlg) protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support //}}AFX_VIRTUAL // Implementation protected: //{{AFX_MSG(CAboutDlg) //}}AFX_MSG DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) { //{{AFX_DATA_INIT(CAboutDlg) //}}AFX_DATA_INIT } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CAboutDlg) //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) //{{AFX_MSG_MAP(CAboutDlg) // No message handlers //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CDesktopsDlg dialog CDesktopsDlg::CDesktopsDlg(CWnd* pParent /*=NULL*/) : CDialog(CDesktopsDlg::IDD, pParent) { //{{AFX_DATA_INIT(CDesktopsDlg) // NOTE: the ClassWizard will add member initialization here //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); exclusion = NULL; } void CDesktopsDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CDesktopsDlg) DDX_Control(pDX, IDC_TRUSTEE, c_Trustee); DDX_Control(pDX, IDC_NONE, c_None); DDX_Control(pDX, IDC_STATUS, c_Status); DDX_Control(pDX, IDC_SYSTEM, c_System); DDX_Control(pDX, IDC_LOGIN, c_Login); DDX_Control(pDX, IDC_ID, c_ID); DDX_Control(pDX, IDC_DESKTOP, c_Desktop); //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CDesktopsDlg, CDialog) //{{AFX_MSG_MAP(CDesktopsDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_DESKTOP, OnDesktop) ON_BN_CLICKED(IDC_LOGIN, OnLogin) ON_BN_CLICKED(IDC_SYSTEM, OnSystem) ON_BN_CLICKED(IDC_NONE, OnNone) ON_BN_CLICKED(IDC_TRUSTEE, OnTrustee) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CDesktopsDlg message handlers BOOL CDesktopsDlg::OnInitDialog() { CDialog::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) { CString strAboutMenu; strAboutMenu.LoadString(IDS_ABOUTBOX); 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 CheckRadioButton(IDC_SYSTEM, IDC_NONE, IDC_SYSTEM); makeInterlock(); updateControls(); return TRUE; // return TRUE unless you set the focus to a control } void CDesktopsDlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialog::OnSysCommand(nID, lParam); } } // If you add a minimize button to your dialog, you will need the code below // to draw the icon. For MFC applications using the document/view model, // this is automatically done for you by the framework. void CDesktopsDlg::OnPaint() { if (IsIconic()) { CPaintDC dc(this); // device context for painting SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); // Center icon in client rectangle int cxIcon = GetSystemMetrics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON); CRect rect; GetClientRect(&rect); int x = (rect.Width() - cxIcon + 1) / 2; int y = (rect.Height() - cyIcon + 1) / 2; // Draw the icon dc.DrawIcon(x, y, m_hIcon); } else { CDialog::OnPaint(); } } // The system calls this to obtain the cursor to display while the user drags // the minimized window. HCURSOR CDesktopsDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CDesktopsDlg::OnCancel() { // TODO: Add extra cleanup here CDialog::OnCancel(); } void CDesktopsDlg::OnOK() { // TODO: Add extra validation here CDialog::OnOK(); } void CDesktopsDlg::OnDesktop() { makeInterlock(); updateControls(); } void CDesktopsDlg::OnLogin() { makeInterlock(); updateControls(); } void CDesktopsDlg::OnSystem() { makeInterlock(); updateControls(); }  /**************************************************************************** * CDesktopsDlg::updateControls * Result: void * * Effect: * Updates the controls ****************************************************************************/ void CDesktopsDlg::updateControls() { } // CDesktopDlg::updateControls  /**************************************************************************** * CDesktopsDlg::makeInterlock * Result: void * * Effect: * Attempts to create the interlock. Fails if the interlock cannot * be created, and leaves 'exclusion' NULL ****************************************************************************/ #define UNIQUE_GUID _T("{44E678F7-DA79-11d3-9FE9-006067718D04}") void CDesktopsDlg::makeInterlock() { if(exclusion != NULL) ::CloseHandle(exclusion); exclusion = NULL; UINT kind = UNIQUE_TO_SYSTEM; if(c_Login.GetCheck() == BST_CHECKED) kind = UNIQUE_TO_SESSION; else if(c_Desktop.GetCheck() == BST_CHECKED) kind = UNIQUE_TO_DESKTOP; else if(c_Trustee.GetCheck() == BST_CHECKED) kind = UNIQUE_TO_TRUSTEE; CString name = createExclusionName(UNIQUE_GUID, kind); c_ID.SetWindowText(name); exclusion = CreateMutex(NULL, FALSE, name); DWORD err = ::GetLastError(); if(err != 0) { /* error */ CString s; if(err == ERROR_ALREADY_EXISTS) s.LoadString(IDS_NOT_UNIQUE); else s.Format(_T("Error %d")); c_Status.SetWindowText(s); } /* error */ else { /* success */ CString s; s.LoadString(IDS_UNIQUE); c_Status.SetWindowText(s); } /* success */ } // CDesktopDlg::makeInterlock void CDesktopsDlg::OnNone() { if(exclusion != NULL) ::CloseHandle(exclusion); exclusion = NULL; CString s; s.LoadString(IDS_NOTEST); c_Status.SetWindowText(s); c_ID.SetWindowText(_T("")); } void CDesktopsDlg::OnTrustee() { makeInterlock(); updateControls(); }