Check is Service running

uses WinSvc

//

function ServiceGetStatus(sMachine, sService: PChar): DWORD;
var
  SCManHandle, SvcHandle: SC_Handle;
  SS: TServiceStatus;
  dwStat: DWORD;
begin
  dwStat := 0;
  // Open service manager handle.
  SCManHandle := OpenSCManager(sMachine, nil, SC_MANAGER_CONNECT);
  if (SCManHandle > 0) then
  begin
    SvcHandle := OpenService(SCManHandle, sService, SERVICE_QUERY_STATUS);
    // if Service installed
    if (SvcHandle > 0) then
    begin
      // SS structure holds the service status (TServiceStatus);
      if (QueryServiceStatus(SvcHandle, SS)) then
        dwStat := ss.dwCurrentState;
      CloseServiceHandle(SvcHandle);
    end;
    CloseServiceHandle(SCManHandle);
  end;
  Result := dwStat;
end;

function ServiceRunning(sMachine, sService: PChar): Boolean;
begin
  Result := SERVICE_RUNNING = ServiceGetStatus(sMachine, sService);
end;

Beispiel :

procedure TForm1.Button1Click(Sender: TObject);
begin
 if ServiceRunning(nil, 'Eventlog') then
    ShowMessage('Eventlog Service Running')
  else
    ShowMessage('Eventlog Service not Running')
end;