I'm using the following code to open and then write a subkey in the registry
Private Sub RegSubKeyCreates(ByVal sKeyPath As String)
Dim RegKey As RegistryKey
Dim SubKeyParam() As String = Nothing
[code]....
When i'm trying to create the subkey i'm geting the error System.NullReferenceException Object reference not set to an instance of an object?
I've had a bit of a look around the net and on the forums but I've yet to find an answer to my question. I've got Visual Basic 2008 Express and I'm trying to write some registry entries, I can write strings fine just using
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I just bet the answer to this question already exists, however I saw no search mechanism under the forum. Anyhow, I would like to change registry data, and this code is asking for an instance to the object.
Dim RegKey As RegistryKey = My.Computer.Registry.LocalMachine.OpenSubKey("HKEY_CURRENT_USERSoftwa reAnyDWGSoftwareDWGtoPDFProSettings", True)
RegKey.SetValue("OutputPDFFileOpt", 1)
Finally, I want to apply this setting to the program on four different computers (local, and three others on the network).
I need to read a value (and possibly adjust the value) in HKLMSoftwareMicrosoftWindowsCurrentVersionUninstall key on both 32 and 64 bit systems.I've tried accessing 'stuff' by compiling my widget as both a 32 and 64 bit app, but nothing is working. Then I came across some information indicating that this could be done from a 32 bit applicaiton using KEY_WOW64_64KEY [URL] somehow, but I can't figure it out.
1) Check the existing value of HKLMSoftwareMicrosoftWindowsCurrentVersionUninstall{ProductGUID}DisplayVersion handling both architectures.
2) If the value <> "" And <> Our Current Version Then
3) Write the Current Version to the value mentioned in step 1.
I wouldn't think this is that difficult as I've worked with registry before, but the 64 bit stuff is throwing me for a loop.It would be nice if I could compile my app to target AnyCPU then detect where its running on 32 or 64 bit. The app could then look and update in the appropriate location.I currently am set to use .NET 2.0, but could go to 4.0 if there is something in there that makes the above tasks easier.
I have looked through more old threads than I can count and I just cannot get any of the suggestions to work. I did a little poking around MSDN as well. I am trying to use the registry to enable AutoLogon on a Win7 machine through code. I can read the current value with no problem but I am running into security problems when I attempt to change AutoLogon to "1". This is what I have done so far.
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I am having problems with opening a file and writing in a new line some data.Instead of writing the data in a new line,it replaces the data in the first line of the file with the new data.The function is this:
Code:
Private Sub cmdAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAdd.Click
ListBox1.Items.Add(txtServerName.Text)
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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:
vb
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)
"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?
View 8 RepliesMy application uses structures that contain strings and arrays that I want to write to disk. I understand that I can create the fixed length data types in the structures by using "ReDim" and "String$", but my question is: Does VB reallocate the storage for the structure which includes these redimensioned members in-line (which would be necessary in order to write the contents to disk), or does it allocate heap and merely store a pointer in the structure?If only a pointer is provided, is there a straightforward workaround to allow me to create fixed length data types in a structure that could be written to a disk file?Or, Is there an I/O method that will handle the situation by recreating a contiguous buffer containing the structure before writing it to disk?
View 1 Replieswith vb.net 2005 exp how to write this [code] values to registrythis data i am extracting from MySQL database.
View 5 RepliesI'm running Windows Vista with admin privilege and UAC is disabled but still unable to write to windows registry!
My.Computer.Registry.SetValue _
("HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRun", _
"Test", "C:Test.exe", Microsoft.Win32.RegistryValueKind.String)
I'm getting error "Unauthorized Access Exception was unhandled."
"Access to the registry key 'HKEY_LOCAL_MACHINE....' is denied."
I've googled the net and found that registry permission elevation is required for admin tasks, Is there away to take registry key ownership through VB.Net code??
I'm having a problem accessing HKLM\Software\Microsoft\Windows\CurrentVersion\Run on windows server 2008 from my vb.net 2005 app. I get "Can not write to .[...] access is denied" . It works fine on XP, server 2003 and vista.
Dim regKey As Microsoft.Win32.RegistryKeyregKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey("Software\Microsoft\Windows\CurrentVersion\Run", True)
Dim checker As Object = regKey.GetValue("Adon") 'if key does not exist create it
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I am basically reading a text file with info like this:
"S1($=""ChW System Pressure"",V=134.00,%=""Pa""),S2($=""UPS_Batt Rm 1to4 Circ A Flow "",V=9.17,%=""DegC""),S3($=""UPS_Battery Rm Sec ChW Rtn"",V=-38.38,%=""DegC""),S4($=""Buffer Vessel BV-02 High Temp"",V=9.08,%=""DegC""),...
And I'm trying to write a program that read the data, filters the sections so that per line it does the bit before the brackets i.e. "S1" then a comma then the sections inside the brackets as comma separated values removing the double quotes and symbols I don't want etc. Basically dividing the separate S*'s onto different lines and separating the values with comma's. There are also other points which are a different letter than "'S" and the same to do with them to.
I want to write a generic file saving routine where the routine is passed data in the form of a collection and it sets a containsStructure flag. I wanted to be able to save the data from the collection, but if it is a collection of structures I want to be able to extract the data from the structure to write to the file.
The only trouble is, that I cannot do something like:
For Each s As dataStructure In data
Next
Since the compiler complains that dataStructure is not defined. Is there a way to code around this?
I am having a windows application. That downloads files from server and write into the local directory. It works fine. When we try the same appliication in Windows 7. IT shows an error Access to the path denied (While writing to the local directory).
View 1 RepliesI'm writing a windows service (MacTimeFix.exe) to fix the Windows time on a Macintosh (it's like this: i live in Moscow (GMT+03:00), and Mac OS thinks that the system time is GMT+00:00 and adds 03:00 to it< and Windows thinks that system time is the local time).I need to execute my code when my VB app is closed. (it happens with the shutdown of Windows) The form is invisible (hidden), and the user mustn't click anything except windws shutdown button. It is a service. When i write a Form1_FormClosing sub, it works only on Alt+F4 or CloseButton and doesn't work when the app is stopped from Windows Task Manager or whatever also.I need a way to execute sub when app is closed with taskkill (without /force) or a way to execute a several app on Winshutdown.
Here is my code:
Public Class Form1
Dim SystemMary As String
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Me.Load
SystemMary = Mid(TimeString, 1, 2)
[code].....
I am working on moving applications from Windows 2000 to new server Windows 2003 R2(64 Bit). I noticed that there are some VB programs and config files for those programs have been placed in Windows 2000 Registry. Some other applications are using them from different servers.Why do we use registry here? How can i move these to registry in windows 2003? Can I just move these or do I have to write VB programs to place them in 2003 registry?
View 1 RepliesSo I need to write out an object to a text file as well as read in objects from text files.How do I accomplish this? This is the code i've used to read and write just simple lines of text. Is there a small modification to this or just a different function i use to read in an entire object?
Code:
Dim path As String
path = "Security.txt"
[code].....
I have just recently been using VB 2010 after using VB5. I have noticed a lot of changes. The problem I have is that I wish to open and save text files to and from arrays in the background. I've attached what I would do in VB5. I have searched around, but all the examples I find use a Textbox instead of an array. Can anyone show me how I can do this with VB 2010?
View 1 Repliesi have a problem writing to the registry. This is my code:
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I have an ASP website with a SQL Server database. I would like to write a windows service, that once a day reads data out of the database. how to connect to the database.
View 3 RepliesI have a structure in memory which is working fine - now I need to write this entire structure to a file.The below code almost compiles, the problem is that "mstaRecordInfo" cannot be changed to a string, probably because of the Date field. I've just spent over an hour experimenting and searching the web but have gotten no closer to a solution
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I am trying to print the contents of my array to a text file, but instead of just printing whats in the array it prints all indexes even if they are empty.
this is the code i am using..
Code:
FileOpen(3, "garbage.txt", OpenMode.Append)
Dim intCounter As Int16
For intCounter = strFirstName.GetLowerBound(0) To strFirstName.GetUpperBound(0)
[Code].....
for a school project I have to write data from a listbox to a new file that a user can create. I can create and save a file no problem, but for some reason I can't write anything. I followed the textbook provided but when the file saves, I open it up and it is blank. I'm using fileWriter.WriteLine and I'm just test something basic to write to a file first and I can't do it:
Code:
Private Sub storeFileButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles storeFileButton.Click
'creates a new file
Dim result As DialogResult ' stores the file
Dim fileName As String ' name the file to save the data
[code]....
I am writing a very specific program that checks and changes some registry keys in the HKEY_CURRENT_USERControl PanelDesktop key. I've had no issues with this in vista or xp. but windows 7 gives me permission errors. the problem is that Administrators group is missing from the permissions table in the registry for this key. I can fix this by opening regedit and right clicking permissions for this key and adding Administrators to the table. However I don't want the end user to have to do this.so how can I add administrators group to the permissions table of this key using vb.net code?Everywhere I look online people say don't write to this part of the registry if I don't have to. well I have to as it is a windows key that I must change. all permissions are set correctly for the program I just need to know how to add administrators to the permissions list in the registry in windows 7 using vb.net?
View 4 Replieshow can i deny all permisions to this registry value.. using vb.net...
My.Computer.Registry.SetValue("HKEY_LOCAL_MACHINEHKEY_LOCAL_MACHINE
SOFTWAREHKEY_LOCAL_MACHINESOFTWAREMicrosoftsql", "001", "001")
How can you write a VB.NET Windows Forms Application via CodeDom? I have tried everything, the closest i got to it is the code below, which first of all shows command prompt window which is not good, and then shows the form for like a second and everything disappears.
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What is the best way to handle resolution issues on the monitor when writing a windows app from VB.Net.I developed an app on my laptop, it's widescreen and res is set to 1440 x 900. When I take my app and run it on a machine with an older Analog monitor and the res is 1024 x 768, all of the forms on the right and bottom are cut off.
View 2 RepliesDoes anyone have experience writing data to the parallel port (printer port) in Windows 7 64-bit. I have been trying inpout32.dll, inpoutx64.dll and following all the info on http://www.highrez.co.uk/ and www.logix4u.net but can't get anything to work. I have an on-board parallel port at &H378 - not an add-on card - and have tried various modes in the BIOS (standard, ECP etc). I have a background in electronics so I am confident my testing methods are sound; I just cannot get a data bit to change state under program control. I need to send data to an 8-bit port on some 20th Century electronics so serial/USB interfaces are not really an option. There must be a way to control those 8 data bits in Windows 7, mustn't there?
View 14 RepliesI am using WritePrivateProfileString for writing INI file in Windows directory and GetPrivateProfileString for reading INI file from Windows directory. In one of my system, I found that writing is not working but reading is working fine. On further investigation, I surprised to find another another Windows folder in C:document and Settings<username>windows. And WritePrivateProfileString is writing INI File in that folder, but reading from C:windows. Any Idea why it is happening? More information Windir Environment variable is returning C:windows and I am passing only file name not full path in the API function. This thing is working fine in all other systems.
View 17 Replies