修改系统服务的启动类型并启动服务

        有时可能需要手动修改系统服务或者我们自己写的服务的启动类型，并手动将服务启动起来，这些手动操作均可以通过代码实现。要实现这样的操作，需要用到下列函数： OpenSCManager、OpenService、ChangeServiceConfig、StartService、CloseServiceHandle，函数的具体说明和用法查看MSDN即可。对于下图，注意调用API函数时，要使用服务名称，不能使用显示名称。

        下面给出将服务设置为自动启动，并将服务启动起来的相关代码：

    BOOL ChangeServiceStartTypeAndStart( CString strSvrName )  
    {  
        SC_HANDLE schSCManager;  
        SC_HANDLE schService;  
      
        // Get a handle to the SCM database.   
        CString strErrInfo;  
      
        schSCManager = OpenSCManager(   
            NULL,                    // local computer  
            NULL,                    // ServicesActive database   
            SC_MANAGER_ALL_ACCESS);  // full access rights   
      
        if (NULL == schSCManager)   
        {  
            strErrInfo.Format(_T("OpenSCManager failed (%d)\n"), GetLastError());  
            AfxMessageBox(strErrInfo);  
            return FALSE;  
        }  
      
        // Get a handle to the service.  
        schService = OpenService(   
            schSCManager,            // SCM database   
            (LPCTSTR)strSvrName,               // name of service   
            SERVICE_CHANGE_CONFIG|SERVICE_START);  // need change config access   
      
        if (schService == NULL)  
        {   
            strErrInfo.Format(_T("OpenService failed (%d)\n"), GetLastError());   
            AfxMessageBox(strErrInfo);  
            CloseServiceHandle(schSCManager);  
            return FALSE;  
        }      
      
        // Change the service start type.(set to auto start type)  
        BOOL bRet = ChangeServiceConfig(   
            schService,        // handle of service   
            SERVICE_NO_CHANGE, // service type: no change   
            SERVICE_AUTO_START,  // service start type     --  将服务的启动类型设置为自动启动
            SERVICE_NO_CHANGE, // error control: no change   
            NULL,              // binary path: no change   
            NULL,              // load order group: no change   
            NULL,              // tag ID: no change   
            NULL,              // dependencies: no change   
            NULL,              // account name: no change   
            NULL,              // password: no change   
            NULL);  
        if ( !bRet )            // display name: no change  
        {  
            strErrInfo.Format(_T("ChangeServiceConfig failed (%d)\n"), GetLastError());   
            AfxMessageBox(strErrInfo);  
            CloseServiceHandle(schService);   
            CloseServiceHandle(schSCManager);  
            return FALSE;  
        }  
        else   
        {  
            strErrInfo.Format(_T("Service disabled successfully.\n"));   
        }  
      
        // Start the service  -- 启动该服务
        bRet = StartService(  
            schService,  // handle to service   
            0,           // number of arguments   
            NULL);  
        // Attempt to start the service.  
        if ( !bRet )      // no arguments   
        {  
            strErrInfo.Format(_T("StartService failed (%d)\n"), GetLastError());  
            AfxMessageBox(strErrInfo);  
        }  
        else   
        {  
            printf("Service start pending...\n");   
        }  
      
        // Close service handles  
        CloseServiceHandle(schService);   
        CloseServiceHandle(schSCManager);  
      
        return bRet;  
    }