public enum SERVICE_STATE : uint

Public Enum SERVICE_STATE As Integer

                       SERVICE_STATES dwServiceState,

SERVICE_STATES, SERVICE_TYPES, ENUM_SERVICE_STATUS, OpenSCManager, EnumServicesStatus, and OpenService

                 SERVICE_STATES.SERVICE_STATE_ALL,

                     SERVICE_STATES.SERVICE_STATE_ALL,

                             SERVICE_STATES.SERVICE_STATE_ALL,

                             SERVICE_STATES.SERVICE_STATE_ALL,

           if (!EnumServicesStatusEx(handle, SC_ENUM_PROCESS_INFO, (int)ServiceType.SERVICE_WIN32, (int)ServiceStateRequest.SERVICE_STATE_ALL, IntPtr.Zero, 0, out iBytesNeeded, out iServicesReturned, ref iResumeHandle, null))

          if (!EnumServicesStatusEx(handle, SC_ENUM_PROCESS_INFO, (int)ServiceType.SERVICE_WIN32, (int)ServiceStateRequest.SERVICE_STATE_ALL, buf, iBytesNeeded, out iBytesNeeded, out iServicesReturned, ref iResumeHandle, null))

      private enum ServiceStateRequest { SERVICE_ACTIVE = 0x1, SERVICE_INACTIVE = 0x2, SERVICE_STATE_ALL = (SERVICE_ACTIVE | SERVICE_INACTIVE) }

     public SERVICE_STATE dwCurrentState;  

Easier Structure (which appears to work fine and allows you to avoid defining the SERVICE_TYPES and SERVICE_STATE enumerations and to use CLR compliant types (int)):

    internal enum SERVICE_STATE : int

        public SERVICE_STATE dwCurrentState;

See ControlService for SERVICE_STATE definition.

public enum SERVICE_STATES : int

     SERVICE_STATE_ALL   = SERVICE_ACTIVE | SERVICE_INACTIVE

Public Enum SERVICE_STATES : int32

    SERVICE_STATE_ALL = SERVICE_ACTIVE Or SERVICE_INACTIVE

public enum SERVICE_STATES : int

     SERVICE_STATE_ALL   = SERVICE_ACTIVE | SERVICE_INACTIVE

<Flags()> Public Enum SERVICE_STATES : int32

    SERVICE_STATE_ALL = SERVICE_ACTIVE Or SERVICE_INACTIVE