Get And Set Environment Variables?
Jan 9, 2009
We have a couple of applications at work that need a reference to the license server set in the User Variables under the Enviroment Variables on the windows xp client machines(system properties, Advanced, Enviroment Variables). The problem is that both applications needs a reference to the same variable name and you can't have two with the same name. What i intend to do is to create a simple windows application with a button for each application that deletes the variable item present, adds a new variable item with the value needed for that application to be able to run and then run the application itself. This is just a temporary fix until we get a more permanent solution. The 'GetEnvironmentVariable' class in vb is not able to add or delete a item, maybe the WIN32 API could do the job.
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May 8, 2010
I wanted to know if its possible to use VB.Net to create a USER Variable in the Environment Variables of the Operating System.
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Aug 9, 2011
I am looking to read a text line from an ini file which may contain strings like %systemRoot% or other environment variables. I was able to write small function to parse such strings as long as it appears only once in the path. for example my fuction can parse %systemroot%system32 and return c:winntsystem32.however if the string contains %systemroot%\%username% i am not sure how to handle that.
[Code]...
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Apr 13, 2011
Below is the code i am using to read and update the system environmental variable. This code is working fine when i am executing .exe on Local Machine. I am getting problem when i try to access this .exe from Browser(using citrix i am doing this) and invoke. when i invoke from browser its going to catch block and displaying MsgBox("Unable to Create LDAP Key.
[Code]...
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Aug 16, 2010
I wrote a DLL a year or two ago on my old computer that worked well for a long time. I moved on to other things, then came back to it recently and discovered that the code doesn't run on my new computer. The problem seems to be with this line: [code]
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Feb 11, 2011
I have an installer, and it installs some native dll's along with the program.The dll's are in a separate folder, which I added to the path environment variable.That was done successfully, and the variable shows up in path if I check the windows system settings.
However, if I start the command line program/service, it says dll's not found...I check the environment variable path with the set command, and my folder is not in there.If I do
SET path = %path%;my/folder/here/
And start my program after that, then it works.According to this MS KB article this is because the computer would need to be restarted.unless I do
SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, 0, (LPARAM) "Environment", SMTO_ABORTIFHUNG, 5000, &dwReturnValue);
Now I did just that, using the below code, but the error message persists. My folder in %path% is correctly spelled, I checked that.
' http://www.pinvoke.net/default.aspx/Enums/SendMessageTimeoutFlags.html '
<Flags()> _
Public Enum SendMessageTimeoutFlags
[code]....
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Nov 14, 2010
This was my code .
Private
Declare
Function addelements
Lib
[Code].....
meeting the requirement i.e procedure to set environment variable and use/get that in my code. make necessary changes in my code accordingly.
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Jun 22, 2012
I am trying to launch a third-party program from my own. I have done a quick search in Program Files and Program Files (x86), and I just realized that the path returned by getenv("ProgramFiles") actually depends on whether I am running in x64 or Win32.How can I search (both in c++ and c# or VB.NET) both Program Files folders, using environment variables and not hard-coded names - since regardless of the version of my program running on the user machine, he might have the other one installed in a different version ?
My code now: in c++:
fs::path root_directory = fs::path(getenv("ProgramFiles"));
// and then I change to
root_directory = fs::path(getenv("ProgramFiles(x86)"));
in VB.NET:
System.Environment.GetEnvironmentVariable("ProgramFiles")
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Dec 15, 2009
I have VB6 Dll which I am referencing in vb.net ,I am calling the following function in it. It working fine in developemnt environment but not in deployement environment.
Error Method not found: 'Boolean MyUtils._MyUtils.LoadMyObjectRecords(ADODB.Stream ByRef, System.Array ByRef)'.
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Dec 11, 2011
Last year (2010) I came across a FANTASTIC command that allowed me to take a string of variables with a common delimiter and break it all back out into separate variables (possibly an array) with one statement.
[Code]...
As long as the delimiter was a unique specifiable character, this one-statement command could break it out into elements. my memory and point me in the right direction.
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Sep 27, 2010
I have code, shown below, that works all except for 1 thing: The variables being passed byRef get passed, but once modified in the else section of the "if me.invokerequired" code of RecordData, the variables are never updated in the calling function. To reiterate, the calling function does not receive the updated data that is in the variables custid and amt.When debugging, I see the data change in the else section of "if me.invokerequired", but once it returns from the callback the data is missing.[code]
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Mar 23, 2012
I define some global variables of a class as follows:
Private Class MyClass
Private var1 as Decimal
Private list1 as List(Of string)[code].....
But I found that after this form is closed, all above variables, var1, list1, list2 still exist in memory. I thought they should be collected by gc since the form is already disposed as I confirmed.
Add: I have monitored half an hour after the form is closed. But these variables are not collected by gc. I have an automatic update procedure on the form which uses above variables.Since the above variables still hold values, the automatic update procedure is always called which causes exception. (One quick fix is to check if form.isDisposed in update procedure. But I do not think this is elegeant. Besides, these variables occupy memory.)
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Jan 7, 2010
Does the memory used in declaring variables are reclaimed by the OS when these variables go out of scope?Does the memory used be released by setting thier value to nothing? if not, then how can I force the garbage collector to run or excecute at a certain/desired time..How about in Windows Forms..How can we make sure that the memory used in initializing and showing forms be released if those forms were closed?
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Mar 8, 2011
Question 1: What is the difference between "Background Worker" and "Worker Pool" as indicated within the MSDN samples provided.
Question 2: I noticed while using, AddressOf _Function_, variables cannot be passed; what would be an efficient solution to this?
Question 3: While using multithreading is it required to invoke before setting variables, or only form properties?
Question 4: While using System.Net.Sockets is it safe/efficient to use Application.DoEvents while waiting for new data; or would be using a Do While loop be fine without DoEvents since the action would be multithreaded? Note: there can be up to 2000-3000 sockets in use at a time.
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Jun 9, 2012
I'm new in .NET programming.I have a class Form1 that includes Button1_Click event.Button1_Click creates a multiple Text Boxies at run time)Here is the class:
Public Class Form1
Dim shiftDown As Integer
Dim counter As Integer
[code].....
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Feb 19, 2009
What is Environment.FailFast? How is it useful?
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Feb 17, 2012
I was trying to learn how to do openGL within a VB .NET environment and it seems that the Tao framework or OpenTK is recommended with OpenTK having a higher recommendation so that is what I chose to try using. Since I am brand new to this, I am trying to just draw a simple box, triangle, or anything really so that I can understand it all before making more complex things. I have been unsuccessful at this so far so I will list in order what I have done so far and hopefully someone here can help me correct it or provide a new example just so I can draw a simple shape.
1) I installed OpenTK using opentk-2010-10-06.exe
2) In a new project I added the references to OpenTK.dll and OpenTK.Compatibility.dll
3) I added the control (opentk.glcontrol.dll)
4) I added the actual control to my form.Using some examples online I added the rest:
5) I wrote my references in:
Imports OpenTK
Imports OpenTK.GLControl
Imports OpenTK.Platform
[code]....
The above results in no display?
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Jul 15, 2009
i could make a 3d environment in VB.net which i could in the future make into a game environment or could i only do this with a language such as C++?
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Jun 24, 2009
Outside of the environment after running the setup program I can tell that the setup is failing miserably. The all important file "cakecreationdb.accdb" cannot be found. I have been beating my brains out against a brick wall on this one.
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Jan 19, 2012
I use Environment.NewLine, my colleagues use vbCrLf.When I'm doing a code review for them I want something that I can point to to say "use Environment.NewLine instead of vbCrLf"
Or, am I just peeing in the wind, and it doesn't really matter ?
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Feb 22, 2011
I am trying to change the way my aspx pages load when I double-click on them in my development environment. I wish for the markup to show instead of the design. So, I go into "Tools" -> "Options" -> "HTML Designer" and make my changes. However, I have to do this every time I get into VS. How do I make those changes stick?
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Oct 15, 2010
Is one able to compile VB 6 code in Visual Studio.NET ? In other words, is it backwards compatible with older VB code?Since I know there is a difference between managed code (.NET) and unmanaged code, I am wondering if Visual Studio.NET is able to compile unmanaged code as well?
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May 19, 2011
I've made a simple program that set environment variables like [code]...
If I close de command prompt then open it again, it's OK.
How can I refresh the environment variables in the command prompt I use my program?
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Jul 30, 2009
Ok, I am needing to capture the username of the user who is logged into a third party software (similar to citrix) which then will launch compiled vb.net applications from the 'Cloud'. If the user logs into their windows active directory machine as Smith123, and then logs into this third party software as SmithS, and launch a compiled program which runs on the remote server, and executes a button that displays the environment .username results, what will return? Smith123 or SmithS?
I am trying to figure this out, and I would just create a program and try it out myself but going through all of the hoops, bells and whistles of where I work just to get a simple compiled piece of code up on the server can be a pain sometimes..
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Aug 3, 2010
Environnent.NewLine seems to be resolving to two spaces " " (as are vbCrLf and ControlChars.CrLF). Using StringBuilder, AppendLine is doing the same.I've been racking my brain and searching the Internet trying to figure out why this the way it is, but am coming up empty.
I am trying to generate .bat file based on user interface decisions. I need to have separation between lines. I'm trying:
[Code]...
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Nov 15, 2009
I successfully converted a VB6 program to .net 2008. Phew. Thats the fast way to learn a new language I'd like to get an exe that I can try running out of the design environment. Is that the "Publish" menu selection?
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Oct 14, 2010
I have a form, and essentially, I want to open the .txt file when it is dropped on my program, in textbox2 in form1. I read you use Environment. GetCommandLineArgs(), but how exactly would you do it?
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May 2, 2012
I have an Add-in to the environment of Visual Studio called NDasm that is located at the following web address
The question is how can I add it to the VS environment, they don;t show in the previous web pages
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Jun 22, 2010
I made a simple Form1, with Text.Box1 (starting value=1) and Text.Box2 (starting value = 100000), as shown in the attachment: I wanted that, when the Form loads,value of Text.Box1 keeps on increasing by 2 and value of Text.Box2 keeps on
[Code]...
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Dec 1, 2008
I am trying to run a vb .net 2005 executable file in the Windows Pre Execution Environment. Tha application is very simple, it will show a form with 2 buttons, one button is exit, the other runs a shell command.When i try to run the exe, absolutely nothing happens. The form is not displayed at all. Anyone know why? The app works fine in a normal windows environment.
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