C++学习笔记－后台服务程序开发模式（四）

//停止和删除已安装的服务程序

void removeService()

{

     SC_HANDLE schService;

     SC_HANDLE schSCManager;

     //打开服务管理数据库

     schSCManager=OpenSCManager(

                       NULL,    //本地计算机

                       NULL,    //默认的数据库

                       SC_MANAGER_ALL_ACCESS  //要求所有的访问权

                       );

     if(schSCManager)

     {

         //获取服务程序句柄

         schService=OpenService(

              schSCManager,          //服务管理数据库句柄

              TEXT(SZSERVICENAME),   //服务名

              SERVICE_ALL_ACCESS     //响应所有的访问请求

              );

         if(schService)

         {

              //试图停止服务

              if(ControlService(

                   schService,                 //服务程序句柄

                   SERVICE_CONTROL_STOP,  //停止服务请求码

                   &ssStatus              //接收最后的服务状态信息

                   ))

              {

                   _tprintf(TEXT("Stopping %s."),TEXT(SZAPPNAME));

                   Sleep(1000);

                   //等待服务停止

                   //

                   while(QueryServiceStatus(schService,&ssStatus))

                   {

                       if(SERVICE_STOP_PENDING==ssStatus.dwCurrentState)

                       {

                            _tprintf(TEXT("."));

                            Sleep(1000);

                       }

                       else

                            break;

                   }

                   if(SERVICE_STOPPED==ssStatus.dwCurrentState)

                       _tprintf(TEXT("\n %s stopped. \n"),TEXT(SZAPPNAME));

                   else

                       _tprintf(TEXT("\n %s failed to stopp. \n"),TEXT(SZAPPNAME));

              }

              //删除已安装的服务程序安装

              if(DeleteService(schService))

                   _tprintf(TEXT("%s removed. \n"),TEXT(SZAPPNAME));

              else

_tprintf(TEXT("DeleteService failed - %s. \n"), GetLastError());

              CloseServiceHandle(schService);

         }

         else

              _tprintf(TEXT("OpenService failed - %s \n"),GetLastError());

         CloseServiceHandle(schSCManager);

     }

     else

         _tprintf(TEXT("OpenSCManager failed - %s \n"),GetLastError());

}