function ServiceStart(aMachine, aServiceName: String): Boolean;
// aMachine is UNC path or local machine if empty
var
  h_manager, h_svc: SC_Handle;
  ServiceStatus: TServiceStatus;
  dwCheckPoint: DWORD;
  ServiceArgVectors : PChar ;
begin
  h_manager := OpenSCManager(PChar(aMachine), nil,SC_MANAGER_CONNECT);
  if h_manager > 0 then
  begin
    h_svc := OpenService(h_manager, PChar(aServiceName),
                         SERVICE_START or SERVICE_QUERY_STATUS);
    if h_svc > 0 then
    begin
      if (StartService(h_svc, 0, ServiceArgVectors)) then { succeeded } 
      begin
        if (QueryServiceStatus(h_svc, ServiceStatus))then
        begin
          while (SERVICE_RUNNING <> ServiceStatus.dwCurrentState)do
          begin
            dwCheckPoint := ServiceStatus.dwCheckPoint;
            Sleep(ServiceStatus.dwWaitHint);
            if (not QueryServiceStatus(h_svc,ServiceStatus)) then
              // couldn't check status
              break;
            if (ServiceStatus.dwCheckPoint < dwCheckPoint)then
              break;
          end;
        end;
      end;
      CloseServiceHandle(h_svc);
    end;
    CloseServiceHandle(h_manager);
  end;

  Result := (SERVICE_RUNNING = ServiceStatus.dwCurrentState);
end;

function ServiceStop(aMachine, aServiceName:String): Boolean;
// aMachine is UNC path or local machine if empty
var
  h_manager, h_svc: SC_Handle;
  ServiceStatus: TServiceStatus;
  dwCheckPoint: DWORD;
begin
  h_manager := OpenSCManager(PChar(aMachine), nil,SC_MANAGER_CONNECT);
  if h_manager > 0 then
  begin
    h_svc := OpenService(h_manager, PChar(aServiceName),
                         SERVICE_STOP or SERVICE_QUERY_STATUS);
    if h_svc > 0 then
    begin
      if (ControlService(h_svc, SERVICE_CONTROL_STOP,ServiceStatus)) then
      begin
        if (QueryServiceStatus(h_svc, ServiceStatus))then
        begin
          while (SERVICE_STOPPED <> ServiceStatus.dwCurrentState)do
          begin
            dwCheckPoint := ServiceStatus.dwCheckPoint;
            Sleep(ServiceStatus.dwWaitHint);
            if (not QueryServiceStatus(h_svc,ServiceStatus)) then
              // couldn't check status
              break;
            if (ServiceStatus.dwCheckPoint < dwCheckPoint)then
              break;
          end;
        end;
      end;
      CloseServiceHandle(h_svc);
    end;
    CloseServiceHandle(h_manager);
  end;

  Result := (SERVICE_STOPPED = ServiceStatus.dwCurrentState);
end;