I write this routine:
Public Function LipPCIsOn() As String
' Return TimeSpan.FromMilliseconds(System.Environment.TickCount).ToString()
Dim query As New SelectQuery("SELECT LastBootUpTime FROM Win32_OperatingSystem WHERE Primary='true'")
Dim searcher = New ManagementObjectSearcher(query)
Dim ret As String = ""
Dim mo As ManagementObject
For Each mo In searcher.Get()
Dim dtBootTime As DateTime = ManagementDateTimeConverter.ToDateTime(mo.Properties("LastBootUpTime").Value.ToString())
ret = (Now - dtBootTime).ToString()
Next
Return ret
End Function
But i have this error:
SelectQuery is not defined
ManagementObjectSearcher is not defined
ManagementObject is not defined
I have these Imports set:
Imports System
Imports System.Management
Imports System.Security
Imports System.IO
Imports System.IO.File
Imports System.IO.FileStream
Imports System.Windows.Forms
Is there anything else needed? Thank you
