C# Definition:

enum POWER_ACTION : uint
{
   PowerActionNone = 0,       // No system power action.
   PowerActionReserved,       // Reserved; do not use.
   PowerActionSleep,      // Sleep.
   PowerActionHibernate,      // Hibernate.
   PowerActionShutdown,       // Shutdown.
   PowerActionShutdownReset,  // Shutdown and reset.
   PowerActionShutdownOff,    // Shutdown and power off.
   PowerActionWarmEject,      // Warm eject.
struct POWER_ACTION_POLICY {
   POWER_ACTION Action;
   uint Flags;
   uint EventCode;
}

[Flags]
enum PowerActionFlags : uint
{
   POWER_ACTION_QUERY_ALLOWED  = 0x00000001, // Broadcasts a PBT_APMQUERYSUSPEND event to each application to request permission to suspend operation.
   POWER_ACTION_UI_ALLOWED     = 0x00000002, // Applications can prompt the user for directions on how to prepare for suspension. Sets bit 0 in the Flags parameter passed in the lParam parameter of WM_POWERBROADCAST.
   POWER_ACTION_OVERRIDE_APPS  = 0x00000004, // Ignores applications that do not respond to the PBT_APMQUERYSUSPEND event broadcast in the WM_POWERBROADCAST message.
   POWER_ACTION_LIGHTEST_FIRST = 0x10000000, // Uses the first lightest available sleep state.
   POWER_ACTION_LOCK_CONSOLE   = 0x20000000, // Requires entry of the system password upon resume from one of the system standby states.
   POWER_ACTION_DISABLE_WAKES  = 0x40000000, // Disables all wake events.
   POWER_ACTION_CRITICAL       = 0x80000000, // Forces a critical suspension.
}

[Flags]
enum PowerActionEventCode : uint
{
   POWER_LEVEL_USER_NOTIFY_TEXT  = 0x00000001, // User notified using the UI.
   POWER_LEVEL_USER_NOTIFY_SOUND = 0x00000002, // User notified using sound.
   POWER_LEVEL_USER_NOTIFY_EXEC  = 0x00000004, // Specifies a program to be executed.
   POWER_USER_NOTIFY_BUTTON      = 0x00000008, // Indicates that the power action is in response to a user power button press.
   POWER_USER_NOTIFY_SHUTDOWN    = 0x00000010, // Indicates a power action of shutdown/off.
   POWER_FORCE_TRIGGER_RESET     = 0x80000000, // Clears a user power button press.
}

[StructLayout(LayoutKind.Sequential, Pack=1)]
struct POWER_ACTION_POLICY
{
   public POWER_ACTION Action;
   public PowerActionFlags Flags;
   public PowerActionEventCode EventCode;
}

VB Definition:

Enum POWER_ACTION
   PowerActionNone = 0    ' No system power action.
   PowerActionReserved    ' Reserved; do not use.
   PowerActionSleep       ' Sleep.
   PowerActionHibernate       ' Hibernate.
   PowerActionShutdown    ' Shutdown.
   PowerActionShutdownReset   ' Shutdown and reset.
   PowerActionShutdownOff     ' Shutdown and power off.
   PowerActionWarmEject       ' Warm eject.
End Enum

<Flags>
Enum PowerActionFlags
   POWER_ACTION_QUERY_ALLOWED = 0x00000001   ' Broadcasts a PBT_APMQUERYSUSPEND event to each application to request permission to suspend operation.
   POWER_ACTION_UI_ALLOWED = 0x00000002      ' Applications can prompt the user for directions on how to prepare for suspension. Sets bit 0 in the Flags parameter passed in the lParam parameter of WM_POWERBROADCAST.
   POWER_ACTION_OVERRIDE_APPS = 0x00000004   ' Ignores applications that do not respond to the PBT_APMQUERYSUSPEND event broadcast in the WM_POWERBROADCAST message.
   POWER_ACTION_LIGHTEST_FIRST = 0x10000000  ' Uses the first lightest available sleep state.
   POWER_ACTION_LOCK_CONSOLE = 0x20000000    ' Requires entry of the system password upon resume from one of the system standby states.
   POWER_ACTION_DISABLE_WAKES = 0x40000000   ' Disables all wake events.
   POWER_ACTION_CRITICAL = &H80000000    ' Forces a critical suspension.
End Enum

<Flags>
Enum PowerActionEventCode
   POWER_LEVEL_USER_NOTIFY_TEXT = &H1     ' User notified using the UI.
   POWER_LEVEL_USER_NOTIFY_SOUND = &H2    ' User notified using sound.
   POWER_LEVEL_USER_NOTIFY_EXEC = &H4     ' Specifies a program to be executed.
   POWER_USER_NOTIFY_BUTTON = &H8     ' Indicates that the power action is in response to a user power button press.
   POWER_USER_NOTIFY_SHUTDOWN = &H10      ' Indicates a power action of shutdown/off.
   POWER_FORCE_TRIGGER_RESET = &H80000000 ' Clears a user power button press.
End Enum

<StructLayout(LayoutKind.Sequential, Pack:=1)>
Structure POWER_ACTION_POLICY
   Public Action As POWER_ACTION
   Public Flags As PowerActionFlags
   Public EventCode As PowerActionEventCode
   Public TODO
End Structure

User-Defined Field Types:

POWER_ACTION

Notes:

None.

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