Lock Down A Function?

Dec 28, 2009

Wrote this code:
Function ReadRegistry(ByVal regType As String, ByVal RegPath As String, ByVal KeyName As String)
Dim regKey As RegistryKey

[Code].....

What I want to do is raise an error if I get passed a value that isn't listed in the case statement.. or it there a way to define it better?

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How To Pass A Function To A Function Is Functors/function Objects Avaiable In VB2010

Oct 12, 2011

I want to make an numerical integration method with takes in an analytic function and integrate it over a specific interval. For the numerical integration procedure I want to use some procedures in nr.com. The problem is that these are programmed in C++ and they uses functors to pass a function to the integration method. How can I do this in VB 2010?

I want to initialize the function (i.e. set a=1,b=0 for function y(x)=a*x+b) and then pass the function to the integration method. Then when the integration method call the function it only calls the function with one parameter (i.e. x since a,b is already set)

What is the best way to do this in VB2010?I want to make a general integration method where I can pass any single valued function and integration limits.

I have just started using VB, and from what I have found so far it seems like the tools you have is

- to us a delegate for the function
- to use a lambda expression for the function
- send a pointer/adressOf
- to create a function class/structure and submit this to the function

As for now I am most inclined to create a function-class. But I am not really sure how.F.ex. I make different classes for each "uniqe function" I want to integrate, but how can I pass them to the integration function when I need to specify the argument type in the integration-function-call?This seems like a basic problem which applies to many Math operations, so I think it would be very useful to clarify this.

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Function Syntax - Call A Function With 2 Arguments When The Function Is Only Defined For One

Apr 1, 2010

I'm trying to undersatnd the syntax of calling a funciton and it seem confusing when I'm using a web service in ASP.net. Maybe this question should be in an ASP forum, but it is a VB question. This simple web service allows you to type in your name and it response with an alert box with you name.

My question is, How can you call a function with 2 arguments when the function is only defined for one. I understand that the second argument is actually a method that handling the respons, but how can you interchange function arguments for methods and how do you know that there are methods for

Here's my call:

<script type="text/javascript">

function HelloWorld()
{

var yourName = $get('txtYourName').value;

[CODE]...

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C# - Lock Statement In VB

May 27, 2009

Is there analogue of lock statement from c# in vb.net?

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How To Lock Form

Jan 23, 2009

Basically,I had a button in my form1,when I click it,then form2 will be display...Now I would like to lock form2 until a button in form2 had been clicked,then only I can do anything in other forms...I means form2 must be closed before I can remain to form1.

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How To Lock Screen

Dec 15, 2011

VB.net how to lock a computer screen using a form

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Lock A Row In MySQL?

Aug 23, 2010

How do I lock a row in MySQL and then only allow the app that locked it to change the values of that row?

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Lock Records On SQL?

Sep 25, 2009

I have a form and its filled from a VIEW of two tables on SQL server. When its opened i dont want other users opening that customers details from either table.I know SQL itself prevents writes if its opened but i want to stop people opening the record in the first place.[code]...

I then tried writing these values to the db on the form loading but it doesent work - it just sends back NULLs. I tried the same code in the on load event into a button and it works fine there. So im thinking i should do this as a Trigger on SQL itself, but im unsure how i could get the users computername or Windows Login name, or even username from the front end im building.

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Lock XML File When In Use?

Dec 6, 2006

I am using XML files to store some iformation that are to be processed. I use this code to interact with the XML file:

Dim xmlDoc As New XmlDocumentxmlDoc.Load("theXMLFile")

Do XML stuff such as add elements...

xmlDoc.DocumentElement.AppendChild(oAlarm)xmlDoc.Save("theXMLFile")

What I want to do is to lock the file so that no other process can use the file. If a process wants to use the file, I also want it to wait and try again until file is available.

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[2005] Lock The PC Using .net?

Aug 7, 2007

how to lock PC using VB.net? So that any user cannot do anything on my PC?

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Set Its Screen Position And Lock It There?

Oct 14, 2010

But not my application.A app i use refuses to be brought forward, so wondered if there was a way for a vb app to run in the bg that can force a specified application to stay on top, & even maybe set its screen position and lock it there???

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Alternative To Transaction Lock?

Mar 20, 2012

In my project i am using begin transaction commit or rollback changes. but this causes lock to the tables in that particular functionality.

So if the any other user does any other functionality those locked table are not available until the transaction is completed. I want to know if there is any alternative to transaction which insures data security but the tables are not locked out.

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BitmapImage In WPF Does Lock File?

Jun 21, 2011

Dim bmi As New BitmapImage(New Uri(fiInfo.FullName, UriKind.Absolute))
bmi.CacheOption = BitmapCacheOption.OnLoad
this does not Use OnLoad

[code].....

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Bypass The Loader Lock?

Mar 29, 2011

how would i bypass the loader lock. I know there is a way to disable it but im not sure how

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Code Snippet To Lock PC

May 15, 2010

This is a part of my project, my project basically uses a motion sensor to detect any intrusion. So one of the modules is to lock the PC on detection of an intruder. Is there a way to lock the PC using Visual Basic?(Because most of the other modules have been programmed in Visual Basic.) I am basically looking for source code that can implement something similar to "Windows button + L".

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Code To Lock Workstation?

Feb 23, 2012

I'm working on a small program to activate winlogon,and to automatically log out of my account, but I'm unsure how to implement this in code.

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Detect Key State Of Num Lock?

Feb 3, 2011

I'm trying to detect the state of num lock but haven't had any luck. using a windows 7 x64 machine.

Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As System.Windows.Forms.Keys) As Short
'num lock check timer

[Code]....

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Get The Current State Of Num Lock?

Sep 2, 2009

How do I get the current state of Num Lock in VB.NET?

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How To Lock A Textbox To A Cell

Aug 15, 2011

I have a windowsform in visual studio 2008, I connect to a ms sql-server.On my form I have a datagridview who I use to enter data etc and save them to the database. I then have textboxes who shows the sum of the columns etc in the table abd save that value back to the database. but for instance if i put the cursor in row 2 of the datagrid the values in theese textboxes dissapear.What I want to know is if there is apossibility to lock the textbox to ex. table test, clomn x and row 1??

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How To Lock A Textbox Using Code

Jan 24, 2012

I'm newbie in VB .Net.I do want to lock a textbox but I cannot supply the right code for it.

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How To Lock Keyboard And Mouse

Jun 8, 2011

I am using vb.net framework 3.5. I want to lock input devices like keyboard and mouse from my application. Is their is anyway using sendkeys or any method to lock?

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How To Lock Label Position

Jun 22, 2010

I need to lock label position. so, my label can't move at all.. now, i'm using label1.Enabled = False.. but, my label.forecolor become gray..

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How To Lock Remote Computer

Mar 8, 2010

can anybody told me how to lock remote computer using Vb.Net2005

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How To Password Lock Files

Jun 24, 2009

how do you lock a single file cuz people r accessing files that r private and help me with VB 2008 code

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Loader Lock Was Detected?

Aug 27, 2010

I am getting this right after I bind grid. I called the db multiple times (no more than 5.) and I bound those result to a datatable and it then throws this error. I was not getting this error yesterday when i was running this program. And there doesnt seem to be anything I have not done before.

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Lock A Table Via Code

Mar 9, 2009

1. I have to select the next invoice number from one table.

2. Then i have to insert this invoice number as it is in three other tables.

3. Then once i have done so i have to go and update the invoice number by +1 (increment by

1). And i have to do this for each row in the datatable.

During this whole period i do not want anyone to access (read or change) that invoice number. We can lock the table or row. Does not matter. How can i do it? I am not suppose to use store procedure. Lock table ... does not work. It is not an T-SQL stmet select invoice number with (readlock) ....... only works while this stement is runned. I want to have the table or row locked until i have done 1,2 and 3rd steps. I have seaching for a stamt in sql which will do this for me! But didnt find anything. All results point me to SP which i cannot use.

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Lock Folders From Application?

May 4, 2010

How to lock a folder from application .net?

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Lock Program For Use Only 30 Days?

Dec 15, 2009

How to lock program.create count number at file or registry,i want to high security.

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Lock The MSChart Gridlines?

Feb 18, 2010

How do I do the following with an MSChart?Set axes to x: [0 - 1000] and y: [0 - 1].Show the gridlines when chart has no points.Disable auto adjusting of gridlines.

Note: Setting Axis(X/Y).(Min/Max)imum seems to have no effect if a point exists inside the bounds.

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Should Always Lock Static Methods?

Nov 3, 2011

In the following example GetList returns an instance of a static (shared) variable. That one needs locking in order to be thread-safe.But what about DoSomething which doesn't use any static variables outside the method? Does it need locking too?I'd like to clarify that in this particular case I expect DoSomething to always print 0-100 in sequence (i.e. no 0123745...) regardless of number of calling threads. Or, in general, that different threads don't affect each other's variables (printing to console is only an example). The language in the following example is VB.NET.[code]

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