IntPtr status = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(SYSTEM_BATTERY_STATE)));

    (UInt32)Marshal.SizeOf(typeof(SYSTEM_BATTERY_STATE))

  SYSTEM_BATTERY_STATE batt_status = (SYSTEM_BATTERY_STATE)Marshal.PtrToStructure(status, typeof(SYSTEM_BATTERY_STATE));

                    [MarshalAs(UnmanagedType.U4)] WINDOWS_STATION_ACCESS_MASK desiredAccess,

    internal enum WINDOWS_STATION_ACCESS_MASK : uint

                WINDOWS_STATION_ACCESS_MASK.WINSTA_ALL_ACCESS, null);

const uint EVENT_OBJECT_STATECHANGE = 0x800A; // hwnd ID idChild is item w/ state change

    const int TCIF_STATE = 0x10;

    tcitem.mask = TCIF_STATE | TCIF_TEXT;

static extern int CM_Get_DevNode_Status(ref int pulStatus, ref int pulProblemNumber, int dnDevInst, int ulFlags);

static extern int CM_Get_DevNode_Status(out UInt32 status, out UInt32 probNum, UInt32 devInst, int flags);

    Private Shared Function CM_Get_DevNode_Status(ByRef status As ULong, ByRef probNum As ULong, ByVal devInst As IntPtr, ByVal Flag As Integer) As Integer

If CM_Get_DevNode_Status(status, problem, DeviceInfoData.DevInst, 0) = CR_SUCCESS Then

    if (CR_SUCCESS == CM_Get_DevNode_Status(ref status, ref problem, devinst, 0) && (DN_REMOVABLE & status) > 0)

     SPDRP_INSTALL_STATE           = 0x00000022, // Device Install State (R)

    ERROR_INVALID_HANDLE_STATE = 1609,

    ERROR_INVALID_HANDLE_STATE = 1609

    public enum IF_OPER_STATUS : uint

    public enum IP_DAD_STATE : uint

        public IP_DAD_STATE DadState;

        public IF_OPER_STATUS OperStatus;

      public enum MIB_TCP_STATE {

      MIB_TCP_STATE_CLOSED,

      MIB_TCP_STATE_LISTEN,

      MIB_TCP_STATE_SYN_SENT,

      MIB_TCP_STATE_SYN_RCVD,

      MIB_TCP_STATE_ESTAB,

      MIB_TCP_STATE_FIN_WAIT1,

      MIB_TCP_STATE_FIN_WAIT2,

      MIB_TCP_STATE_CLOSE_WAIT,

      MIB_TCP_STATE_CLOSING,

      MIB_TCP_STATE_LAST_ACK,

      MIB_TCP_STATE_TIME_WAIT,

      MIB_TCP_STATE_DELETE_TCB

    Public Const COOKIE_STATE_ACCEPT As Integer = &H1

    Public Const COOKIE_STATE_PROMPT As Integer = &H2

    Public Const COOKIE_STATE_LEASH As Integer = &H3

    Public Const COOKIE_STATE_DOWNGRADE As Integer = &H4

    Public Const COOKIE_STATE_REJECT As Integer = &H5

    Public Const COOKIE_STATE_ACCEPT As Integer = &H1

    Public Const COOKIE_STATE_PROMPT As Integer = &H2

    Public Const COOKIE_STATE_LEASH As Integer = &H3

    Public Const COOKIE_STATE_DOWNGRADE As Integer = &H4

    Public Const COOKIE_STATE_REJECT As Integer = &H5

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 {

struct SYSTEM_BATTERY_STATE {

Structure SYSTEM_BATTERY_STATE

    public SYSTEM_POWER_STATE AcOnLineWake;

    public SYSTEM_POWER_STATE SoftLidWake;

    public SYSTEM_POWER_STATE RtcWake;

    public SYSTEM_POWER_STATE MinDeviceWakeState;

    public SYSTEM_POWER_STATE DefaultLowLatencyWake;

SYSTEM_POWER_STATE

    public SYSTEM_POWER_STATE MinSystemState;

    Public MinSystemState As SYSTEM_POWER_STATE

SYSTEM_POWER_STATE

enum SYSTEM_POWER_STATE

Enum SYSTEM_POWER_STATE

public class SYSTEM_POWER_STATUS_EX2

Public Class SYSTEM_POWER_STATUS_EX2

public class SYSTEM_POWER_STATUS_EX2

Public Class SYSTEM_POWER_STATUS_EX2

   USB_CONNECTION_STATUS  ConnectionStatus;

            public SYSTEM_POWER_STATE MaxSleepAc;

            public SYSTEM_POWER_STATE MaxSleepDc;

        Public MaxSleepAc As SYSTEM_POWER_STATE

        Public MaxSleepDc As SYSTEM_POWER_STATE

        /// WLAN_INTERFACE_STATE->_WLAN_INTERFACE_STATE

        public WLAN_INTERFACE_STATE isState;

     ''' WLAN_INTERFACE_STATE->_WLAN_INTERFACE_STATE

     Public isState As WLAN_INTERFACE_STATE

WLAN_INTERFACE_STATE

public struct WLAN_HOSTED_NETWORK_PEER_STATE

     public WLAN_HOSTED_NETWORK_PEER_AUTH_STATE PeerAuthState;

Structure WLAN_HOSTED_NETWORK_PEER_STATE

public struct WLAN_HOSTED_NETWORK_RADIO_STATE

     DOT11_RADIO_STATE dot11SoftwareRadioState;

     DOT11_RADIO_STATE dot11HardwareRadioState;

Structure WLAN_HOSTED_NETWORK_RADIO_STATE

public struct WLAN_HOSTED_NETWORK_STATUS

     public WLAN_HOSTED_NETWORK_STATE HostedNetworkState;

     public WLAN_HOSTED_NETWORK_PEER_STATE[] PeerList;

Structure WLAN_HOSTED_NETWORK_STATUS

        wlan_notification_acm_adhoc_network_state_change,

        wlan_notification_acm_adhoc_network_state_change

        wlan_notification_msm_radio_state_change,

    Public T_STATE As ABState

    ABN_STATECHANGE = 0

            retState.T_STATE = ABState.ABS_MANUAL

            retState.T_STATE = ABState.ABS_ALWAYSONTOP

            retState.T_STATE = ABState.ABS_AUTOHIDE

            retState.T_STATE = ABState.ABS_AUTOHIDEANDONTOP

        private uint BIF_STATUSTEXT     = 0x0004;  // Top of the dialog has 2 lines of text for BROWSEINFO.lpszTitle and one line if

     out QUERY_USER_NOTIFICATION_STATE pquns);

enum QUERY_USER_NOTIFICATION_STATE

            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"