Question

Trapping a specific HResult from a COMexception in VB.net

Asked by: straubtm

I have a client that is getting the following error...

System.Runtime.InteropServices.COMException (0x80010002): Call was canceled by the message filter. (Exception from HRESULT: 0x80010002 (RPC_E_CALL_CANCELED))
   at System.Management.ManagementScope.Initialize()
   at System.Management.ManagementObject.Initialize(Boolean getObject)
   at System.Management.ManagementClass.GetInstances(EnumerationOptions options)
   at System.Management.ManagementClass.GetInstances()
(etc., etc.)

The error is caused by the WMI not starting up before the program that is crashing.  I plan to add a 10 sleep and try again if the error is HRESULT: 0x80010002 (RPC_E_CALL_CANCELED)...

BUT, I can't reproduce the error, so I don't know if the code If my error handling will work (or if I coded it correctly).  My since the errorCode is a 32-bit Integer, I'm not sure if I can just convert 80010002 to an int (= 2147549186) and not have to pad it.  Please let me know if the attached code snippet is correctly trapping 0x80010002

Thanks!!!!!

Private Function Identifier(ByVal wmiClass As String, ByVal wmiProperty As String) As String
        'Return a hardware identifier
        Try
            Dim Result As String = ""
            Dim mc As New System.Management.ManagementClass(wmiClass)
            Dim moc As System.Management.ManagementObjectCollection = mc.GetInstances
            Dim mo As System.Management.ManagementObject
            For Each mo In moc
                'Only get the first one
                If Result = "" Then
                    Try
                        Result = mo(wmiProperty).ToString
                        Exit For
                    Catch ex As Exception
                        'Ignore error
                    End Try
                End If
            Next mo
 
            Return Result
        Catch ex As Runtime.InteropServices.COMException
            If ex.ErrorCode = 2147549186 Then '0x80010002
                System.Threading.Thread.Sleep(10000)
                Return Identifier(wmiClass, wmiProperty)
            End If
        End Try
        
    End Function

                                  
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:

Select allOpen in new window

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2008-10-27 at 17:30:10ID23852765
Tags

vb.net

Topics

Miscellaneous Programming

,

Algorithms

,

Microsoft Visual Basic.Net

Participating Experts
1
Points
500
Comments
1

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

  1. Error Trapping
    I need to trap for a Runtime error 426 and when this happens I need an email send to test@test.com with the error code in the message. Can some on send me some sample code to me with this this in it. Thanks...
  2. trap shutdown event
    can i trap windows shutdown event in vb.net and also trap the termination event of a console application if yes how ???
  3. Trapping Num pad keys
    Hi We have written the following piece of code in the application.onmessage handler to trap the WM_KEYDOWN event and do some processing. We are facing a problem trapping the number keys on the NUMPAD. When the NUMLOCK pad is on and the ‘1’ on the num pad is pressed, M...
  4. Trapping KeyStrokes
    I'm trying to trap keystrokes in my C# program and it doesn't seem to be working, can someone tell me what I'm doing wrong? Here is My Code: private void Form1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) { e.Handled = true; switch(e.KeyCode) { ...

Free Tech Articles

  1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
    It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
  2. SCCM OSD Basic troubleshooting
    SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
  3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
    This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
  4. Create a Win7 Gadget
    This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
  5. Outlook continually prompting for username and password
    There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
  6. Backup Exchange 2010 Information Store using Windows Backup
    There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

Cloud Class Webinars

  1. Avoiding Bugs in Microsoft Access
    Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
  2. Top 10 Best New Features in Visio 2010
    Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
  3. IT Consultant Business Secrets Revealed
    Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
  4. Disaster Recovery and Business Continuity
    Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
  5. Organize Your Visio Diagrams with Containers and Lists
    Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
  6. How to Us Objects, Properties, Events and Methods in Microsoft Access
    Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Join the Community

Answers

 

by: grayePosted on 2008-10-30 at 09:28:55ID: 22842601

Yeah, that works...   You can also use the "WHEN" statement.   Here is an example:

            Try
                ' do something here
            Catch com_ex As System.Runtime.InteropServices.COMException When com_ex.ErrorCode = &H800706BA
                MsgBox("The Remote PC is not responding.  It may be off line or" & vbCr & "firewall settings are preventing the connection", MsgBoxStyle.Exclamation, "Error")
                Exit Sub
            Catch ua_ex As System.UnauthorizedAccessException
                MsgBox("The Remote PC refused the connection.  This is most likely" & vbCr & "due to a permissions issue." & vbCr & "Note: Windows XP Home Edition cannot be configured to support remote connections", MsgBoxStyle.Exclamation, "Error")
                Exit Sub
            Catch wmi_ex As System.Management.ManagementException When wmi_ex.ErrorCode = Management.ManagementStatus.AccessDenied
                MsgBox("You do not have sufficient privileges on the remote PC" & vbCr & "This application requires Administrator rights on the Remote PC", MsgBoxStyle.Exclamation, "Error")
                Exit Sub
            Catch ex As Exception
                If IsNothing(ex.InnerException) Then
                    MsgBox("Could not get initial data" & vbCr & ex.Message, MsgBoxStyle.Critical, "Error")
                Else
                    MsgBox("Could not get initial data" & vbCr & ex.Message & vbCr & ex.InnerException.Message, MsgBoxStyle.Critical, "Error")
                End If
                Exit Sub
            End Try

                                              
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:

Select allOpen in new window

20120131-EE-VQP-002

3 Ways to Join

30-Day Free Trial

The Experts

98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

The Experts

97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

Testimonials

"...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

Testimonials

"I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

Testimonials

"WOW! You guys have great, active, and knowledgeable people on here." moore50

Business Clients

Business Clients

In the Press

"If you’ve got a question... Experts Exchange can supply an answer.”

In the Press

"...an invaluable aid for both IT professionals and those who require tech support."

In the Press

"where IT professionals provide quick answers on just about any topic"

Business Account Plans

Loading Advertisement...