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In this tutorial, we will going to create a program that will get and display all the computer ports in vb.net. COM Ports are serial communications port on a PC. Now, let's start this tutorial! Let's start with creating a Windows Form Application for this tutorial by following the following steps in Microsoft Visual Studio: Go to File, click New Project, and choose Windows Application. Next, add only one Button named Button1 and labeled it as ' Get Computer Ports'.

Insert a ListBox named ListBox1 for displaying all the COM Ports. You must design your interface like this: 3. Put this code in your Button1_Click.

This will trigger to get and display all the available COM Port in the ListBox. Filtered HTML • Web page addresses and e-mail addresses turn into links automatically.

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You are polling the wrong WMI class/hive. Of course Microsoft is the OS manufacturer; what you need is Win32_ComputerSystem: Imports System.Management cs = New ManagementObjectSearcher('SELECT * FROM Win32_ComputerSystem') For Each objMgmt In cs.Get _Manufacturer = objMgmt('manufacturer').ToString() _Model = objMgmt('model').ToString() _SystemType = objMgmt('systemtype').ToString _totalMem = objMgmt('totalphysicalmemory').ToString() Next Manufacturer will be something like 'Dell, Inc', Model comes out spot on with mine, but has been known to sometimes include internal sub model identifiers. System type comes back as 'x64-based PC' on mine. MS has a WMI query builder somewhere to help fnd and use the right query, though it generates very wordy code.

Give this a try in a console application. Just remember to add the System.Management reference to your project. You need to access the Win32_ComputerSystem not the Win32_OperatingSystem. Sub Main() Dim objCS As Management.ManagementObjectSearcher Dim manufacturerName As String 'objOS = New Management.ManagementObjectSearcher('SELECT * FROM Win32_OperatingSystem') objCS = New Management.ManagementObjectSearcher('SELECT * FROM Win32_ComputerSystem') For Each objMgmt In objCS.Get manufacturerName = objMgmt('manufacturer').ToString() Next Debug.WriteLine('Manufacturer: ' & manufacturerName) End Sub Hope it helps.