Wake On Lan

[stavris]

Hi all,

Is there a way to detect programmatically if WOL is supported/enabled on a machine?

Cheers,

--Stav.

[jmcilhinney]

I'm sure that it is and that it would be done using WMI. I have no idea what the details would be, but that gives you an avenue to investigate.

[ForumAccount]

'//need a reference to System.Management
Imports System.Management
 
Public Class Form1
 
    Protected Overrides Sub OnLoad(ByVal e As System.EventArgs)
        MyBase.OnLoad(e)
 
        MessageBox.Show(WakeUpType.GetWakeUpType().ToString())
 
    End Sub
 
End Class
 
Public Class WakeUpType
 
    '//constants
    Protected Const WMIQuery As String = "SELECT WakeUpType FROM Win32_ComputerSystem"
    Protected Const WMIElement As String = "WakeUpType"
 
    '//constructors
    Private Sub New()
    End Sub
 
    '//methods
    Public Shared Function GetWakeUpType() As WakeUpTypes
        Try
            Using searcher = New ManagementObjectSearcher(WakeUpType.WMIQuery)
                Using results = searcher.Get()
                    For Each result In results
                        Dim item = result.Item(WakeUpType.WMIElement)
                        If item IsNot Nothing AndAlso _
                           [Enum].IsDefined(GetType(WakeUpTypes), item) Then
                            Return CType(item, WakeUpTypes)
                        End If
                    Next
                End Using
            End Using
        Catch ex As ManagementException
        End Try
        Return WakeUpTypes.Unknown
    End Function
 
    '//enumerations
    Public Enum WakeUpTypes As UShort
        Reserved = &H0
        Other = &H1
        Unknown = &H2
        APMTimer = &H3
        ModemRing = &H4
        LANRemote = &H5
        PowerSwitch = &H6
        PCIPME = &H7
        ACPowerRestorted = &H8
    End Enum
 
End Class

Reference

[stavris]

Thanks for the replies guys.

ForumAccount, I have tried the code and it returns "PowerSwitch". There is only 1 "result" in "results" by the way.

The msdn reference page confused me a bit too. It says the following:

WakeUpType
Data type: uint16
Access type: Read-only

Event that causes the system to power up.

That made me think that it might be refering to the last wake up event...???
Just to eliminate any doubts that were created I have tried running the code after waking up the machine using WOL and the result of the code was once again "PowerSwitch"...

Any more input will be much appreciated.

Cheers,

--Stav.

[ForumAccount]

I'm not really sure at this point. When you say 'enabled on a machine' do you mean enabled in the bios? Or enabled in the network adapter?

[stavris]

Both.