[DllImport("Netapi32.dll", CharSet = CharSet.Auto/*, SetLastError=true //Return value (NET_API_STATUS) contains error */)]

        Dim state As DFS_STORAGE_STATES

    DFS_STORAGE_STATES state;

[2014-02-27] The function does not set the last error value, the error is returned directly and is in NET_API_STATUS format /Stoyan Sabev/

            if (storage.State == (DFS_STORAGE_STATE_ACTIVE | DFS_STORAGE_STATE_ONLINE)) ActiveOnlineServer = storage.ServerName;

            if (storage.State == (DFS_STORAGE_STATE_ACTIVE | DFS_STORAGE_STATE_ONLINE))

[DllImport("Netapi32.dll", CharSet=CharSet.Unicode/*, SetLastError=true //Return value (NET_API_STATUS) contains error */)]

[Stoyan Sabev] The function does not set the last error value, the error is returned directly and is NET_API_STATUS form

    'NET_API_STATUS NetFileClose(

    'NET_API_STATUS NetFileEnum(

    ByRef bufferType As NETSETUP_JOIN_STATUS) _

    As NET_API_STATUS

} // NETSETUP_JOIN_STATUS

NET_API_STATUS - Possible return values are NERR_Success and ERROR_NOT_ENOUGH_MEMORY

Public Enum NETSETUP_JOIN_STATUS As UInteger

    Public GroupType As NETSETUP_JOIN_STATUS

Public Enum NET_API_STATUS As UInteger

Public Enum NETSETUP_JOIN_STATUS As UInteger

        ByRef bufferType As NETSETUP_JOIN_STATUS) _

        As NET_API_STATUS

        (ByVal lpBuffer As IntPtr) As NET_API_STATUS

        Dim status As NET_API_STATUS

            If status = NET_API_STATUS.NERR_Success Then

     As NET_API_STATUS

NET_API_STATUS - Possible value are NERR_Success, ERROR_NOT_ENOUGH_MEMORY and ERROR_INVALID_PARAMETER.

     If NetRemoteComputerSupports(ComputerName, Wanted, supports) = NET_API_STATUS.NERR_Success Then

NET_API_STATUS NetSessionDel(

        ERROR_INVALID_HANDLE_STATE = 1609,

using NET_API_STATUS = System.UInt32;

internal static extern NET_API_STATUS NetUseAdd(

     internal DWORD  ui2_status;

using NET_API_STATUS = System.UInt32;

        internal static extern NET_API_STATUS NetUseEnum(

    ByRef resumeHandle As IntPtr) As NET_API_STATUS

        internal DWORD  ui2_status;

    Public ui2_status As UInt32

    Private Enum NET_USE_STATUS As UInteger

            EVENT_MODIFY_STATE    = 0x00000002,

            MUTEX_MODIFY_STATE    = 0x00000001,

            SEMAPHORE_MODIFY_STATE    = 0x00000002,

            TIMER_MODIFY_STATE    = 0x00000002,

            TIMER_QUERY_STATE    = 0x00000001

                IntPtr hMutex = Native.OpenMutex( ( uint ) ( Native.SyncObjectAccess.MUTEX_MODIFY_STATE ), false, name );

                        hMutex = Native.OpenMutex( ( uint ) ( Native.SyncObjectAccess.MUTEX_MODIFY_STATE ), false, name );

static extern bool GetSystemPowerStatus(out SYSTEM_POWER_STATUS

SYSTEM_POWER_STATUS

See Also: NCB, LANA_ENUM, ADAPTER_STATUS, NAME_BUFFER

   Dim adapt As ADAPTER_STATUS

   Dim myAdapt As New ADAPTER_STATUS

  const uint EVENT_MODIFY_STATE        = 0x0002 ;

        EVENT_MODIFY_STATE        = 0x00000002,

        MUTEX_MODIFY_STATE        = 0x00000001,

        SEMAPHORE_MODIFY_STATE    = 0x00000002,

        TIMER_MODIFY_STATE        = 0x00000002,

        TIMER_QUERY_STATE        = 0x00000001

  IntPtr handle= OpenEvent(EVENT_ALL_ACCESS | EVENT_MODIFY_STATE, false, name);

const UInt32 MUTEX_MODIFY_STATE = 0x0001;

static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);

public enum EXECUTION_STATE :uint

Note that the return value is the EXECUTION_STATE that ''was'' set.

Description of what the different EXECUTION_STATE does

        SetThreadExecutionState(EXECUTION_STATE.ES_DISPLAY_REQUIRED | EXECUTION_STATE.ES_CONTINUOUS);

        SetThreadExecutionState(EXECUTION_STATE.ES_CONTINUOUS);

        SetThreadExecutionState(EXECUTION_STATE.ES_CONTINUOUS | EXECUTION_STATE.ES_AWAYMODE_REQUIRED);

        SetThreadExecutionState(EXECUTION_STATE.ES_SYSTEM_REQUIRED);

    BIF_STATUSTEXT = 0x00000004,

    BIF_STATUSTEXT = &H00000004

    BIF_STATUSTEXT As Long = &H00000004

enum DFS_STORAGE_STATES {

    DFS_STORAGE_STATE_OFFLINE=0x1,

    DFS_STORAGE_STATE_ONLINE=0x2,

    DFS_STORAGE_STATE_ACTIVE=0x4

Enum DFS_STORAGE_STATES

enum DFS_VOLUME_STATE {

    DFS_VOLUME_STATE_OK =0x1,

    DFS_VOLUME_STATE_INCONSISTENT=2,

    DFS_VOLUME_STATE_OFFLINE=3,

    DFS_VOLUME_STATE_ONLINE=4

Enum DFS_VOLUME_STATE

    DLGC_STATIC = 0x0100,

    public const int STG_E_STATUS_COPY_PROTECTION_FAILURE = unchecked((int)0x80030305);

    public const int OLE_E_STATIC = unchecked((int)0x8004000B);

    public const int DV_E_STATDATA = unchecked((int)0x80040067);

    public const int OLE_S_STATIC = unchecked((int)0x00040001);

    public const int NTE_BAD_KEY_STATE = unchecked((int)0x8009000B);

    public const int NTE_BAD_HASH_STATE = unchecked((int)0x8009000C);

    //  FACILITY_STATE_MANAGEMENT

    #region (0x220000 - 0x22FFFF) FACILITY_STATE_MANAGEMENT=34 errors

    Public Const STG_E_STATUS_COPY_PROTECTION_FAILURE As Integer = CInt(&H80030305UI)

    Public Const OLE_E_STATIC As Integer = CInt(&H8004000bUI)

    Public Const DV_E_STATDATA As Integer = CInt(&H80040067UI)

    Public Const OLE_S_STATIC As Integer = CInt(&H40001)

    Public Const NTE_BAD_KEY_STATE As Integer = CInt(&H8009000bUI)

    Public Const NTE_BAD_HASH_STATE As Integer = CInt(&H8009000cUI)

    '  FACILITY_STATE_MANAGEMENT

    #Region "(0x220000 - 0x22FFFF) FACILITY_STATE_MANAGEMENT=34 errors"

        FEATURE_FORCE_ADDR_AND_STATUS = 23,

public enum MIB_TCP_STATE

    MIB_TCP_STATE_CLOSED = 1,

    MIB_TCP_STATE_LISTEN = 2,

    MIB_TCP_STATE_SYN_SENT = 3,

    MIB_TCP_STATE_SYN_RCVD = 4,

    MIB_TCP_STATE_ESTAB = 5,

    MIB_TCP_STATE_FIN_WAIT1 = 6,

    MIB_TCP_STATE_FIN_WAIT2 = 7,

    MIB_TCP_STATE_CLOSE_WAIT = 8,

    MIB_TCP_STATE_CLOSING = 9,

    MIB_TCP_STATE_LAST_ACK = 10,

    MIB_TCP_STATE_TIME_WAIT = 11,

    MIB_TCP_STATE_DELETE_TCB = 12

Public Enum MIB_TCP_STATE

    MIB_TCP_STATE_CLOSED = 1

    MIB_TCP_STATE_LISTEN = 2

    MIB_TCP_STATE_SYN_SENT = 3

    MIB_TCP_STATE_SYN_RCVD = 4

    MIB_TCP_STATE_ESTAB = 5

    MIB_TCP_STATE_FIN_WAIT1 = 6

    MIB_TCP_STATE_FIN_WAIT2 = 7

    MIB_TCP_STATE_CLOSE_WAIT = 8

    MIB_TCP_STATE_CLOSING = 9

    MIB_TCP_STATE_LAST_ACK = 10

    MIB_TCP_STATE_TIME_WAIT = 11

    MIB_TCP_STATE_DELETE_TCB = 12

    /// #define NET_API_STATUS DWORD

    public enum NET_API_STATUS : uint

Public Enum NET_API_STATUS as UInteger

Many kernel-mode standard driver routines and driver support routines use the NTSTATUS type for return values. Additionally, drivers provide an NTSTATUS-typed value in an IRP's IO_STATUS_BLOCK structure when completing IRPS.

    OLECMDTEXTF_STATUS = 2

    OLECMDTEXTF_STATUS = 2

        ERROR_STATE_MACHINES_NOT_STARTED,

        ERROR_STATE_MACHINES_ALREADY_STARTED,

        ERROR_INVALID_AUTH_STATE,

  public enum RM_APP_STATUS : uint

     SC_MANAGER_QUERY_LOCK_STATUS   = 0x00010,

                      SC_MANAGER_QUERY_LOCK_STATUS |

    SC_MANAGER_QUERY_LOCK_STATUS = &H10

    SC_MANAGER_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED And SC_MANAGER_CONNECT And SC_MANAGER_CREATE_SERVICE And SC_MANAGER_ENUMERATE_SERVICE And SC_MANAGER_LOCK And SC_MANAGER_QUERY_LOCK_STATUS And SC_MANAGER_MODIFY_BOOT_CONFIG

     SERVICE_QUERY_STATUS       = 0x00004,

                       SERVICE_QUERY_STATUS     |

    SERVICE_QUERY_STATUS = &H4

            SERVICE_QUERY_STATUS Or _

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

    SPDRP_INSTALL_STATE = 0x00000022,

    /// The buffer receives a TOKEN_STATISTICS structure that contains various token statistics.

enum USB_CONNECTION_STATUS

Enum USB_CONNECTION_STATUS

typedef enum _USB_CONNECTION_STATUS {

} USB_CONNECTION_STATUS, *PUSB_CONNECTION_STATUS;

    WS_EX_STATICEDGE = 0x00020000,

    WS_EX_STATICEDGE = 0x00020000,

    WS_EX_STATICEDGE = &H20000

    WS_EX_STATICEDGE As Long = &H20000

    WS_EX_STATICEDGE = 0x00020000,

    WS_EX_STATICEDGE = &H20000

    WS_EX_STATICEDGE As Long = &H20000

public enum WLAN_HOSTED_NETWORK_PEER_AUTH_STATE

     wlan_hosted_network_peer_state_invalid,

     wlan_hosted_network_peer_state_authenticated

Enum WLAN_HOSTED_NETWORK_PEER_AUTH_STATE

    wlan_hosted_network_reason_virtual_station_blocking_use,

    wlan_hosted_network_reason_service_available_on_virtual_station

        public enum WLAN_INTERFACE_STATE

        /// wlan_interface_state_not_ready -> 0

        wlan_interface_state_not_ready = 0,

        /// wlan_interface_state_connected -> 1

        wlan_interface_state_connected = 1,

        /// wlan_interface_state_ad_hoc_network_formed -> 2

        wlan_interface_state_ad_hoc_network_formed = 2,

        /// wlan_interface_state_disconnecting -> 3

        wlan_interface_state_disconnecting = 3,

        /// wlan_interface_state_disconnected -> 4

        wlan_interface_state_disconnected = 4,

        /// wlan_interface_state_associating -> 5

        wlan_interface_state_associating = 5,

        /// wlan_interface_state_discovering -> 6

        wlan_interface_state_discovering = 6,

        /// wlan_interface_state_authenticating -> 7

        wlan_interface_state_authenticating = 7,

     Public Enum WLAN_INTERFACE_STATE

     ''' wlan_interface_state_not_ready -> 0

     wlan_interface_state_not_ready = 0

     ''' wlan_interface_state_connected -> 1

     wlan_interface_state_connected = 1

     ''' wlan_interface_state_ad_hoc_network_formed -> 2

     wlan_interface_state_ad_hoc_network_formed = 2

     ''' wlan_interface_state_disconnecting -> 3

     wlan_interface_state_disconnecting = 3

     ''' wlan_interface_state_disconnected -> 4

     wlan_interface_state_disconnected = 4

     ''' wlan_interface_state_associating -> 5

     wlan_interface_state_associating = 5

     ''' wlan_interface_state_discovering -> 6

     wlan_interface_state_discovering = 6

     ''' wlan_interface_state_authenticating -> 7

     wlan_interface_state_authenticating = 7

        wlan_intf_opcode_radio_state,

        wlan_intf_opcode_interface_state,

        wlan_intf_opcode_statistics,

     wlan_intf_opcode_radio_state

     wlan_intf_opcode_interface_state

     wlan_intf_opcode_statistics

internal struct ADAPTER_STATUS

Private Structure ADAPTER_STATUS

typedef struct _ADAPTER_STATUS {

} ADAPTER_STATUS, *PADAPTER_STATUS;

    public struct CERT_REVOCATION_STATUS

Structure CERT_REVOCATION_STATUS

    public int State;                        // State of this volume, one of DFS_VOLUME_STATE_*

    public int State;                        // State of this volume, one of DFS_VOLUME_STATE_*

        public int State;                                            // State of this volume, one of DFS_VOLUME_STATE_*

    public int State;    // State of this storage, one of DFS_STORAGE_STATE_*, possibly OR'd with DFS_STORAGE_STATE_ACTIVE        

public struct ENUM_SERVICE_STATUS

     public SERVICE_STATUS ServiceStatus;

Structure ENUM_SERVICE_STATUS

   public SYSTEM_POWER_STATE LidOpenWakeAc;

   public SYSTEM_POWER_STATE LidOpenWakeDc;

   Public LidOpenWakeAc As SYSTEM_POWER_STATE

   Public LidOpenWakeDc As SYSTEM_POWER_STATE

SYSTEM_POWER_STATE

    SYSTEM_POWER_STATE MinSleepAc;

    SYSTEM_POWER_STATE MinSleepDc;

    SYSTEM_POWER_STATE ReducedLatencySleepAc;

    SYSTEM_POWER_STATE ReducedLatencySleepDc;

        Private MinSleepAc As SYSTEM_POWER_STATE

        Private MinSleepDc As SYSTEM_POWER_STATE

        Private ReducedLatencySleepAc As SYSTEM_POWER_STATE

        Private ReducedLatencySleepDc As SYSTEM_POWER_STATE

SYSTEM_POWER_STATE, POWER_ACTION_POLICY

    /// Bitmask of attachment flags. Flags are MAPI_OLE and MAPI_OLE_STATIC.

    ''' Bitmask of attachment flags. Flags are MAPI_OLE and MAPI_OLE_STATIC.

    NT_STATIC = 10006,

    NT_STATIC_NON_DOD = 10007

    NT_STATIC = 10006

    NT_STATIC_NON_DOD = 10007

    public MIB_TCP_STATE State

        get { return (MIB_TCP_STATE)state; }

MIB_TCP_STATE

    public MIB_TCP_STATE State

        get { return (MIB_TCP_STATE)state; }

    Public m_state As UInteger

    Public ReadOnly Property State() As MIB_TCP_STATE

            Return DirectCast(m_state, MIB_TCP_STATE)

MIB_TCP_STATE

struct RAS_STATS

Private Structure RAS_STATS

public struct SERVICE_STATUS

     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)):

    private struct SERVICE_STATUS

Private Structure SERVICE_STATUS

    internal enum SERVICE_STATE : int

        public SERVICE_STATE dwCurrentState;

See ControlService for SERVICE_STATE definition.

   private static extern bool SetServiceStatus(IntPtr hServiceStatus, ref SERVICE_STATUS lpServiceStatus);

    ByRef lpServiceStatus As SERVICE_STATUS)

   public struct SERVICE_STATUS {