Error Accessing The System Registry

Apr 18, 2007

I have the error: "Error accessing the system registry" when I am in VB6. Goto Project --> References then I have that error.


Accessing The Registry In A 64 Bit System?

Aug 17, 2009

I would be grateful for information or a link to a clear explanation on issues relating to accessing the registry in a 64 bit system (I don't have access to a 64 bit machine so can't test). I have a VB.Net app' that needs to read the registry to find where Ghostscript is installed. This is: key = Registry.LocalMachine.OpenSubKey("SOFTWARE\GPL Ghostscript")

If the VB.Net app (made on my 32 bit machine) is run on a 64 bit machine, will it still work (assuming the key for Ghostscript is the same on 64 bit)? Or do I need to manually access the 'Wow6432Node' registry or something? Plus, are there any security implications reading the registry or can I safely assume that an installed app' will always be able to read the registry?

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Error Message 'VBCustom_Controls_Actions_Reg_Graph Was Unable To Register Itself In The System Registry'

Sep 26, 2009

I try to install Visual Basic 4-32bit on Vista Business but I get an error message 'VBCustom_Controls_Actions_Reg_Graph was unable to register itself in the system registry' ; is there a way to get around it ?

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Accessing MultiString Data From The Registry?

Dec 15, 2009

I'm using VB 2005 Express Edition.I'm trying to use VB to do a few things, the first of which is to display the data behind the registry key at;

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost\netsvcs.

The data I want list should look something like:



This shows no errors initially, but complains about not being able to convert "string()" to "string" once I run it. I'm assuming this is because the data I want is a line of string entries, but I can't find a solution.FYI, this is a project I'm working on to heal a Conficker attack at work. Our third party support has stopped the spread and healed the servers, but has now left me with the job of doing a 3 minute registry fix on each of our 400 computers, hence the attempt to automate it!

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Accessing Registry Keys With Spaces?

Sep 4, 2010

I'm trying to access a registry key that has a space in it, specifically:

SoftwareMicrosoftWindowsCurrentVersionWindowsU pdateAuto Update The key is valid and I believe the code is, though I can't get any keys with spaces to open using Registry.OpenSubKey

The following code fails only for keys with spaces: subkey = New String("SoftwareMicrosoftWindowsCurrentVersion WindowsUpdateAuto Update")

m_hive = m_hive.OpenSubKey(subkey, False) Dim val As Object = m_hive.GetValue(key)

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Accessing Files Off Of A Drive That Has A Different Path From System To System?

Mar 26, 2011

I'm coding this neat little project that's kind of a hack into the SanDisk U3 Cruzer's ability to have both a CDFS and FAT32 File System. This is helpful because the program is burned to the CDFS (It's basically slip streamed as an .ISO in place of the original U3 .ISO), and the settings files (which I've developed as text files) are placed on the root of the flash drive. The program itself is VERY simple actually, except I'm having a slight issue that's really driving me insane:

The drive path of the Flash Drive won't be the same from computer to computer. I.E... The files are "UAI.txt" and "UInfo.txt". The root of the drive on my comp is "I:", but on my laptop is "F:". So if I program the path from my computer as the absolute path, an exception is thrown when the path changes on another computer. I cannot have this happen. It is probably THE MOST crucial element to this program. How can you save and read info if you can't find the files? =P 

So I've gone through so many threads and forums trying to find a batch of code to allow me to make the path relative. I've found the following code (modified, of course). It works PERFECT in Debug, but throws an exception once packaged to the CDFS partition:


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File I/O And Registry :: Accessing Files In Alphabetical Order?

Nov 20, 2009

For a project, I need to extract all the frames of an AVI video. This I have accomplished by with free program. The problem: it took a 30 second clip and spit back 5400 some frames, and the image only changes every 20 frames or so. I really only need about 270 frames, but I didn't want to go through each one manually. So, I wrote a small program using Visual Studio 2008 and VB to open each image in binary and compare it to the one before that. If there is a discrepancy of more than 55000 (to accommodate slight errors in capturing), it leaves the file be. If not, it deletes it.

After much troubleshooting, I got it all to work. I ran it on the directory containing the images, but when it finished, only the first image remained. I checked into it, and found that the FSO loop I have set up to loop through each file was pulling the files in apparently random order. It will give me the image "bg(01).bmp" and then immediately "bg(1362).bmp" and so on. And the order changes every run.

I tried setting up an array to generate a list of all the files and then sort them, so I could pull off the name of the file, then the next one, ect. but it took over 3 hours to finish processing the array, and then It was using a huge chunk of RAM.Is there some way to "force" vb to pull off files in alphabetical order? here is my, code, it belongs with a form. fPath is a global variable, simply pointing to the source directory.


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File I/O And Registry :: Error Is Coming Registry Access Is Not Allowed.While Opening A Key

Jan 21, 2009

Error is coming Registry Access is not allowed.While Opening a Key.

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
NewDelete("HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun", "Sonia")
End Sub


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System Registry Referencing?

Feb 11, 2010

I have a program that write a key to the HKEY_CURRENT_USER (it stores an email address there & I call it later to send to that address)On form load a dialog opens & asks for email address.Everything OK on testing the program, when I deploy the application the dialog doesn't open. I assume this has got to be something to do with what references I add.I have added system & system32 but still doesn't work. The code I have is below.what references to add & if/what to copy to output directory.I'm using VBExpress 2008

I have added:-

Public Const c_strKeyName As String = "HKEY_CURRENT_USER\Software\TimWadSoftware\ServiceReport\"
Private Sub MainForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load


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System.UnauthorizedAccessException When Writing To Registry Key?

Nov 17, 2009

My application needs to change the default signature of outlook and I need to change the value of a registry key for this. But I get a error that I probaly don't have enough permissions. Strange thing is, if I change it manually it doesn't complain.

Error:System.UnauthorizedAccessException : Cannot write to the registry key.

Happens at the 2nd line:

Dim subkey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey("SoftwareMicrosoftWindows NTCurrentVersionWindows Messaging SubsystemProfilesOutlook9375CFF0413111d3B88A00104B2A6676�0000002") subkey.SetValue("New Signature", Text.Encoding.Unicode.GetBytes("Eigen"), Microsoft.Win32.RegistryValueKind.Binary)

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.net - Error Accessing MQs From .NET?

Mar 15, 2012

I have a VB.NET console application that must write a message onto a queue (resides on the mainframe). We have all the clustering and everything set-up by our admin. We already have an existing windows service that successfully listens to messages and also writes messages to various queues.I have basically re-used most of my code from the windows service project.But when I try to access the queue manager, I hit the exception "MQRC_HOST_NOT_AVAILABLE". The error log from the Websphere MQ folder says

AMQ9213: A communications error for occurred.

EXPLANATION:An unexpected error occurred in communications.

ACTION:The return code from the call was 0 (X'0'). Record these values and tell the systems administrator.

Here is the complete exception stack.

IBM.WMQ.MQException was unhandled


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'System.IO.FileNotFoundException' When Attempting To Write To Registry

Mar 4, 2012

I am currently writing an app that as a part of it function it has to write a value to the registry in


A first chance exception of type 'System.IO.FileNotFoundException' occurred in WindowsApplication1.exe I am bit confused by this error as I am not accessing any files but editing the registry. I am running Visual Basic 2010 (as administrator), dot net framework 4 on Windows 7.

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Hook Registry Changes And Maybe Even File System Changes In VS 2010?

Dec 10, 2011

Is it possible to hook registry changes and maybe even file system changes in VS 2010?

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Remote Registry Read Via

Apr 4, 2008

I need to read the value of one subkey located under a list of 17,000 keys in windows registry. I have no problem doing it locally but cannot get the name space to do the same remotely. I know MSDN documents the name space but much more knowledge is assumed than in other areas I have used.  Assume no problems with connection and authentication.[code]....

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Tweaking Registry To Add Applicaion To System Startup?

Jul 6, 2009

I want my application to startup thorugh registry if the specified checkbox1 is checked and to delete it from registry if the checkbox1 is not checked.With the following code im able to create registry but, im unable to delete it.I want it to work like it works for softwares for e.g Utorrent.


Private Sub CheckBox1_CheckStateChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckStateChanged
If CheckBox1.Checked Then[code]....

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VS 2008 - System Variables / Editing Registry Value

Apr 21, 2010

Can VB 2008 use the system variable %1 that contains what filename a program was opened with? I am making a new app that when you click a .exe file and select the right option, it will edit the registry but I need to be able to keep the filename that I right clicked on so that I know what registry value to edit, is this possible?

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.net - WPF : Accessing A UI Object With A Thread Gives An Error?

Jul 5, 2011

I have a function that is called when a file is modified in a folder. This function updates the items of a listview which is stored in the UI.Here is the function :

Private Sub FileChangeNotify()


Here is the error: "Le thread appelant ne peut pas accéder à cet objet parce qu'un autre thread en est propriétaire." (Translation : The calling thread cannot access this object because it is owned by another thread)

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Accessing A UI Object With A Thread Gives An Error?

Feb 1, 2011

ccessing a UI object with a Thread gives an error

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Why Is Registry Access Denied - 'System.Security.SecurityException' In Mscorlib.dll

Jan 11, 2010

Trying to read key "HKLMSOFTWAREPoliciesMicrosoftWindowsWindowsU pdateAU" value "AUOptions" and get the following : A first chance exception of type 'System.Security.SecurityException' occurred in mscorlib.dll Error occurs in ReadRegistry key SOFTWAREPoliciesMicrosoftWindowsWindowsUpdate AU : Requested registry access is not allowed. This occurs in my application when application is run under an account called OPER in the USERS group. The application :

1/is on my PC's hard drive, its not a web app or on a network share

2/is launched via a desktop click

3/ has a manifest specifying executionlevel "AsInvoker"

It does not occur when the Application is run as an Administrator. It does not occur if I read the value with a non .NET program when logged in as OPER whch makes me think it is a .NET problem not a registry permissions problem. Examining "Effective Permissions" shows that my OPER login has query value permission.I need the application to be able to read the key like the non .NET application while running at USERS level.

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Error: A First Chance Exception Of Type 'System.InvalidOperationException' Occurred In System.Data.dll

May 5, 2011

I am using VS 2008, Office 2007, and Win7 Home Premium on my system.I have a simple application which should be a breeze to build. All I am attempting to do is pull data from an Access database with four small tables into a data grid on a windows project. Should be simple, set up the data connection, choose a datagrid from the table in the data source view, drag it onto the page and done, right?I can't get it to work.  It will all work fine until I attempt to run or debug the project.  The data will not show up.  The data grid does, but I get this error: A first chance exception of type 'System.InvalidOperationException' occurred in System.Data.dll

As I said, the project seems to build fine, but it will not pull the data.  After the initial build I get the message that Windows will show this page in Compatibility View. Is it something with Win7 Home Premium, or a setting somewhere? 

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VS 2008 : Error - Cannot Perform 'Like' Operation On System.Int32 And System.String"

Nov 2, 2009

I'm trying to use DataView.Rowfilter and I'm getting an exception which says "Cannot perform 'Like' operation on System.Int32 and System.String".

Here's the code...

Dim str2 As Double = CDbl(searchSTR)
Me.shipperDV.RowFilter = fieldName & " LIKE '*" & str2 & "*'"

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DB/Reporting :: Error: Cannot Perform '=' Operation On System.Int32 And System.String

Mar 6, 2010

I wrote the code below which calculates the length of a line on the form and save record. An error occurs when the programme tries to save the record. It gives me "Cannot perform '=' operation on System.Int32 and System.String" error. I checked the data type of "ID"(int), "Microscope"(Varchar), "Magnification"(int) and "Calibration"(Decimal), and they are fine so far as I know.

Private Sub btnEnd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEnd.Click
'Check if the length textbox is not empty


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Error : An Unhandled Exception Of Type 'System.StackOverflowException' Occurred In System.dll

Mar 21, 2011

get out from the below loop

Shared Function GetIPAddress() As String
Dim sam As System.Net.IPAddress
Dim sam1 As String


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Error - An Unhandled Exception Of Type 'System.StackOverflowException' Occurred In System.Windows.Forms.dll

Feb 19, 2010

When I run my project I get "An unhandled exception of type 'System.StackOverflowException' occurred in System.Windows.Forms.dll"

Public Class frmViewReport
Dim objForm As New frmViewReport
Private Sub frmViewReport_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
objForm.ViewReport("C:a2.rtp", , "@parameter1=test�mter2=10")


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Error : A First Chance Exception Of Type 'System.ArgumentException' Occurred In System.Windows.Forms.dll

Nov 16, 2009

I have the following code running, the first time I change the selected index, everything runs smoothly.  However, if I try to change the selected index again, nothing happens and the subcategories combobox values do not change. 

Private Sub cboMainCategory_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboMainCategory.SelectedIndexChanged
'* make sure the combobox is fully loaded


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Error : An Unhandled Exception Of Type 'System.ArgumentOutOfRangeException' Occurred In

May 6, 2009

I keep getting an eroor this error says: An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in Additional information: Specified argument was out of the range of valid values.

Option Strict On
Public Class frmWeeklyReport
Inherits System.Windows.Forms.Form


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Error - Soap Serializer Does Not Support Serializing Generic Types : System.Nullable`1[System.DateTime]

Oct 2, 2009

Im working on my first n-tier application.  I am trying to serialize a structure and Im getting an error"Soap Serializer does not support serializing Generic Types : System.Nullable`1[System.DateTime]."Here is the structure that is being serialized
Namespace Structures

<Serializable()> _
Public Structure structAllergy
Public AllergyID As String
Public ProfileID As String


The bold line is the line that is throwing the error.

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Error:A First Chance Exception Of Type 'System.Reflection.TargetParameterCountException' Occurred In System.Windows.Forms.dll

Feb 6, 2010

I am working on a card game, and i get this werid error:

A first chance exception of type 'System.Reflection.TargetParameterCountException' occurred in System.Windows.Forms.dll

The code that is cousing this error is:

Private Delegate Sub ShowcardDelegate(ByVal test As String, ByVal objtest As Object, ByVal value As Boolean)
Private Sub Showcard(ByVal test As String, ByVal objtest As Object, ByVal value As Boolean)
If objtest.InvokeRequired Then


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System.Exception: Unexpected Return Code: 1 At System.Data.OracleClient.DBObjectPool.GetObject Error

Jul 13, 2010

I have a windows service written in .NET 2.0 that will run every 5 minutes and executes bunch oracle SQL/PLSQL scripts based on time/validation, it throws the above said error some times against some SQLs, the same SQLs run fine at later point without any error, I have no idea what is going on with the app. I am not sure if this has any thing to do with oracle connection pool as I am properly closing the connections after every SQL execution.


System.Exception: Unexpected return code: 1 at System.Data.OracleClient.DBObjectPool.GetObject(Object owningObject, Boolean& isInTransaction) at System.Data.OracleClient.OracleConnectionPoolManager.GetPooledConnection(String encryptedConnectionString,


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Error - LINQ To Entities Does Not Recognize The Method 'System.Object IIf(Boolean, System.Object, System.Object)'

Jul 29, 2011

I am getting following error whenever I want to use IIf function inside entity framework query.

LINQ to Entities does not recognize the method 'System.Object IIf(Boolean, System.Object, System.Object)' method, and this method cannot be translated into a store expression.

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PrintDialog Windows - Getting An Error "An Exception Of Type 'System.Runtime.InteropServices.SEHException' Occurred In System...?

Dec 1, 2011

I'm using a 64 Bit Windows 7 system and trying to use PrintDialog. I know it doesn't work on Windows 7 unless you add this

PrintDialog1.UseEXDialog = True

So I have added that code but then I get this error for the following

Dim result As DialogResult = PrintDialog1.ShowDialog()

And the error:

"An exception of type 'System.Runtime.InteropServices.SEHException' occurred in System.Windows.Forms.dll but was not handled in user code

Additional information: External component has thrown an exception."

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Error: 'System.InvalidOperationException' (LINQ, System.Core.dll)?

Mar 20, 2012

What in this block of code would throw this exception?

'Get Highest Revision Number
If MyExtract_BTR.RevisionBlocks.Count > 1 Then


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VS 2008 Get Permission Denied Error While Accessing A Database Via OleDB

Jan 28, 2010

I've got a problem whereby I get Permission Denied while accessing a database via OleDB. I know how to unlock this but i'm not permitted to do so. I was wondering if ODBC would work? I'm not sure on the settings around this on my the PC where I'm going to use this application but wonder if this has less security around it. your thoughts until I can test this next week. Or is there another way you may know that I can use a database. (access)

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Checking The Operating System Language As A Condition To Create Registry Entry In The Setup Project?

Mar 20, 2012

I have an installer for my application that makes changes to the registry for better application performance However, depending on the language of the operating system installed this input need changes For example (which is the case itself) Systems in Portuguese the entry is called (Padrao)Systems in English the  entry is called (Default) I know I have I change the property "Condition" of the entry I created but I do not know what I have to write in this "Condition" I write within this property to validate that The system is in English or The system is in Portuguese I plan to put the project set two registry entries, one that will be done on systems with English language and other entry in systems with Portuguese language?

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Error Getting Registry Keys

Jun 13, 2012

I am trying to list all printers for all users by listing the registry key info

I get errors "object variable or with block variable not set " [code]...

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Error When Setting Registry Value

Nov 19, 2009

I am setting a value in the registry like this[code]...

Problem is, if opensubkey would return nothing. Then .GetValue will throw an exception, obivously.[code]...

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Error : Access To The Registry Key Is Denied

Mar 11, 2011

In all the years that I've been coding I have never come accross this issue or error.  For the past 3 months I have been working on two separate apps.  Initialy I started out with Win Vista and things were going great except for how slow my comp was running. So I reinstalled the Vista OS. Everything was going great until Mar 7th when this error just started occuring within my code.

"Access to the registry key 'HKEY_CURRENT_USERSoftwareTornadoAppsSwift BudgetUser' is denied"

TornadoApps/Swift Budget are strings created upon App install or first run of App in VB 2008.The User value along with 9 other values were all working fine prior to Mar 7th.Now this line along with many others like it with defferent strings and values were working just fine till this week. So i figured that I'd just upgrade to Win7 hoping that would fix it. IT didn't. So I reformatted and installed fresh Win7 and still have the error. So I have figured out that it isn't my OS. Cuase it was working in Vista then just quit working.

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Error In Vista :::: Adding Key To Registry?

Sep 24, 2010


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VS 2008 Error While Writing To Registry?

Jun 13, 2009

"An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll" when writing to registryI write to the registry quite often in my program (Around 10 times every 12 seconds) the error doesnt constantly pop up sometimes it can save 20times and on 21st ill get the above error. How can i fix this. Is it because im saving so often?

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VS 2010 - Error: Error 1 Operator '=' Is Not Defined For Types 'System.Drawing.Image'

Jan 24, 2011

If i type this in:


I get an error: Error 1 Operator '=' is not defined for types 'System.Drawing.Image' and 'System.Drawing.Bitmap'.

I have also used 'is' instead of '=' but that doesn't work either.

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