api控制系统服务

SC_HANDLE  sc=OpenSCManager(NULL,NULL,SC_MANAGER_ALL_ACCESS); //服务控制器

//获得服务状态

DWORD get_srvst(SC_HANDLE sc)
{

 SC_HANDLE  schService;
 if (NULL == sc) 
    printf("OpenSCManager failed (%d)\n", GetLastError());

 schService = OpenService(
        sc,          // SCM database 
        L"sharedaccess",          // service name
        SERVICE_ALL_ACCESS); 
 
    if (schService == NULL) 
    { 
  printf("OpenSCManager failed (%d)\n", GetLastError());
        return 0; 
    }
 SC_STATUS_TYPE st;
 LPSERVICE_STATUS_PROCESS buf;
 buf=(LPSERVICE_STATUS_PROCESS) LocalAlloc(LPTR, 1024);
 DWORD dwneed;
 if(QueryServiceStatusEx(schService,SC_STATUS_PROCESS_INFO,(LPBYTE)buf,1024,&dwneed))
 {
  return buf->dwCurrentState;
 }

 return 0;

 
}


int Open_Service(SC_HANDLE sc)
{


    SC_HANDLE  schService;
    if (NULL == sc) 
    printf("OpenSCManager failed (%d)\n", GetLastError());

    schService = OpenService(
        sc,          // SCM database 
        L"sharedaccess",          // service name
        SERVICE_ALL_ACCESS); 
 
    if (schService == NULL) 
    { 
        printf("OpenSCManager failed (%d)\n", GetLastError());
        return 0; 
    }



    if (!StartService(
            schService,  // handle to service 
            0,           // number of arguments 
            NULL) )      // no arguments 
    {
        return 0; 
    }
    else 
    {
        printf("Service start pending.\n"); 
    }
    
    CloseServiceHandle(schService);
    return 0;
}
int Close_Service(SC_HANDLE sc)
{
    
    SC_HANDLE  schService;
    if (NULL == sc) 
    printf("OpenSCManager failed (%d)\n", GetLastError());

    schService = OpenService(
        sc,          // SCM database 
        L"sharedaccess",          // service name
        SERVICE_ALL_ACCESS); 
 

    if (schService == NULL) 
    { 
        return 0; 
    }
    SERVICE_STATUS ssStatus; 

    ControlService(schService,SERVICE_CONTROL_STOP,&ssStatus);
    CloseServiceHandle(schService);
}

dwCurrentState

Current state of the service. This member can be one of the following values.