where is the sysinfo counterpart in .NET?

Posted on 2004-04-15
Last Modified: 2007-12-19
I am new to .NET and am attempting to upgrade a VB6 application that tracks whether or not a laptop is on battery power or oputlet power.

The upgrade wizard simply wrapped the sysinfo control - Interop.SysInfoLib and AxInterop.SysInfoLib

I found the PowerStatusChange event in .NET but have had no luck finding the properties:

Question by:take_the_train
  • 2
LVL 41

Expert Comment

ID: 10836278
I'd recommend the use of Windows Management Instrumentation (WMI)...  it'd go something like this:

' remember to also add System.Management as a reference
Imports System.Management

Dim wmi As ManagementClass
Dim objs As ManagementObjectCollection
Dim obj As ManagementObject

wmi = New ManagementClass("Win32_Battery")
objs = wmi.GetInstances()
For Each obj In objs

Author Comment

ID: 10838572
'EstimatedRunTime' is not a member of 'System.Management.ManagementObject'.
'BatteryStatus' is not a member of 'System.Management.ManagementObject'.

Sorry if I am dense but I received the following two build errors and could not find these properties in the system management object.

Expert Comment

ID: 10838695
look into learning how to use
Import Microsoft.Win32.RegistryKey
Get the values you need there as far
as settings and such.

Start Regedit in the run box
and look at
HKEY_CURRENT_USER\Control Panel\PowerCfg

Hope it helps
LVL 41

Accepted Solution

graye earned 250 total points
ID: 10841429
oops, you're right... I was mixing the syntax used with VBScript.   Sorry about that.

the proper syntax for VB.Net is:


Besides, I was kinda hoping you'd be looking at the Win32_Battery documentation, so you'd see all of the other objects that were out there... I only listed two.

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