Decrypting And Checking RegistryKey Value On Form Startup
Aug 16, 2011
I have encrypted a user inputted value and successfully stored it in the Windows Registry. Now I am having problems Decrypting that RegistryKey when my Form starts up and making sure it is the same key that was originally stored. My decrypting code has been working but if I go inside the Registry and add an extra character on to that keys value, my program is still running.. It is not supposed to run if that RegistryKey is not the one that was originally user inputted..[code]And I also have tried A LOT of other examples, but I am not going too post them all. So is there anyway I can check if a RegistryKey exists and Decrypt it to make sure that it has not been changed on my programs startup?
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Nov 11, 2009
i deleted my previous start up form to be replaced by another one but each time i launch the application,the deleted start up form is still displayed.i dont know from where this deleted start up form is being loaded.
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Jun 20, 2010
I can hide my startup form (or make it appear hidden) on startup. I can start my app on windows startup--through registry values--if the user checks a checkbox.
But if the app starts up on windows startup, I want the form to be hidden, so the program can just keep working without bothering anyone. If it starts up because the user started it, I want the form to be showing, because the user probably wants to change some settings or something.
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Sep 16, 2011
with an error I can't seem to get aroundregistry (originally written back in .NET v1.1 and has been upgraded to v3.5). I'm trying to get it 64-bit compliant and am almost done. Anyhow, we also have a small .net utility application that was written for the system admins that maintain the application to edit/change the registry values since they are encrypted and can't just be changed via Regedit. The error I'm getting is in the utility application code.
Error: "The specified RegistryKeyPermissionCheck value is invalid. Parameter name: mode"
The error pops up when the utility code attempts to create a non-existant subkey, like so:
Dim regKey As RegistryKey
[code]....
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May 9, 2009
I have problem of writing the registry key under the hkey_local_machine. I keep get the same error when I effort to get the key on hkey_local_machine software and to write the new key .[code]...
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Jul 6, 2009
I found an example to let the app startup with windows. I'm also trying to remove the key with the app, but I only getting exceptions.[code]
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May 11, 2009
I have the code below that should enumerate a certain registry key. When I try to run the code, it gives the error "Type 'RegistryKey' not defined." I'm assuming I need to add a reference to the project, but I'm not sure what.[code]
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Mar 23, 2011
well i successfully docked a perpixel alpha form with the main form(form1). but the perpixel alpha form always appears at the top left corner of the screen and when i move the main form the form(perpixel alpha form) inside it dosen't move it stays at the top left corner. ALWAYS. to dock the perpixel alpha form i used
Me.toplevel = false
Me.parent = form1
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Jul 2, 2009
I am using vb.net 2008 i have been using a mdi form which is the startup form for my prog. and i have a main menu on that form. now i would like to shift to tree view as my client has asked for it. whenever a node is selected i can select the form corresponding for that particular code. everything is fine till here. but when the form is loaded the tree view is coming on top of the form the tree view is docked in a pannel. now i have tried everything treemenu.sendtoback and the say the form to b called is taxtypemaster then taxtypemaster.bringtofront but still the tree view is coming over the form
I have tried the following :
Dim mMenuSelected As String = e.Node.Name
Select Case e.Node.Name
[CODE]...
Even the visible doesnt work as it seems after the .show it makes the tree view visible again. how do i hide the treeview pls. someone guide me at the earliest. i feel it is not the prob. of treeview but something to do with the mdi form am i right ?
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Dec 16, 2010
Dim regkey As New RegistryKey
i get this error: type microsoft.win32.registrykey has no constructors
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Jan 3, 2010
What I want is -
Dim filename = System.IO.Path.GetFileNameWithoutExtension(Application.ExecutablePath.ToString)
Dim openForm As Object
[Code]....
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May 23, 2011
As usual, I change the startup form under Application tab. At this time, it doesn't run my selected Startup form. Whatever I set to any forms or even excluding that form, it still runs the same form.
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Mar 31, 2009
Is there a way to get the name of startup form? I want to access a property of a control that is on startup form.
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Jul 28, 2010
VB2008 application.
Using a splashscreen.
When the spashscreen is done, the main menu for the program appears.
The problem is that the main menu appears UNDER things already open on the desktop.
Always On Top could be the answer BUT if I do that, all sub-menus will be UNDER the main menu rather than stacked on top.
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Oct 30, 2010
I continue to get this error when using the code samples from Cengage's book Zak's Programming with Microsoft Visual Basic 2008. I am running Visual Studio 2010.I am attaching the code below:
Option Explicit On
Option Strict On
Option Infer Off
[code].....
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May 16, 2011
I'm supposed to invoke the click event for the two default radio buttons when the form first appears on the screen and I did that but its giving me the following error message when I run the form.A startup form has not been specified.url..
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Oct 15, 2011
I have an problem to assign a startup form in vb.net. I have three forms:
1) Registration Form
2) Login Form
3) Main Form
Firstly i have set set startup form as registration in properties =>Application after registration completed or saved i am displaying the Login form by hiding the registration form. and entering username and password it displays the Main form. Now the twist when i exit from application next time i started to run my project where i can check if their is entry in registration form it will directly goto login form.
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Feb 16, 2012
I need to put following code in the Constructor of my startup form.
JohnKenedy.BusinessSQLEXPRInstaller _ins = new JohnKenedy.BusinessSQLEXPRInstaller(" _ <Installation Display Name>", "localhost", "<New database instance name>", _
"<new database name>", "<database password>", "<database backup filename>");
if (_ins.IsDone == false) _ins.ShowDialog();
if (_ins.IsRestart == true) {
Application.Exit();
this.Close();
return;
}
But I really do not know what the Constructor is and how to access it?
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May 28, 2009
make my application choose which form to startup using an IF statement. Where can I type my IF statement to make it work that way? Please explain in very simple terms.
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Jun 1, 2011
I created a VB.Net Windows Forms application and my Form1 is my startup form. I want to have a class be my startup file instead of my form. In c# you have program.cs which does that for you but I cant seem to find something like that in vb.net.
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May 25, 2009
How do I do it, I suppose it would be through properties but Im not sure where
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Aug 2, 2010
this might be a really dumb question, but if someone could enlighten me I'm writing a Winforms application in VS2008 vb.net.The application starts with a main form. I've got a status bar at the bottom of the main form, indicating the application status. I've got a 'SetAppStatus' method on the Main form.
I'm writing a class that needs to update this status. So in the class I'm Importing the Main Form. But I don't know how to call this SetAppStatus method because I don't know what the instance of the main form is called Plus am I doing this the right way? I'm still grappling a bit with how .NET all fits together and it can get a bit baffling :)
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Sep 13, 2009
I have a startform called start1 this opens a form called oppstart, I added Me .Close avter the showialog codelike this:
[Code]...
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May 12, 2009
I have a VB.net program that originally had a form. I added a module and then deleted the form, but now I get the error...
"A startup form has not been specified"
With VB6 I would change the startup object to sub main, but I can't see how to do this in the properties of the project. I tried changing the application type to console, but then I get the following error...
No accessible 'Main' method with an appropriate signature was found in 'WindowsApplication1'
How can I do this without using the original form?
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Sep 10, 2009
When developing a Windows Forms Application, I can see in the Application.Designer.vb file where Me.MainForm = Form1, but I can't find where/how Form1 actually gets newed-up.
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Mar 8, 2012
Let's say a create a new project consisting of form1, sized at 400x400.I add a datagridview box of say 350x350 in size.Now that looks fine when the program is run. Except if the user increases the size of the window - or even worse maximises the window on a high res screen. Now my lovely 350x350 datagridview box looks silly on the huge empty background.Is there a way to set the datagridview box to increase in size automatically as the window grows?
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Dec 11, 2009
There are many algorithms for encryption in internet. But i found them more complex. I want simple and powerful algorithm for encryption and decrytion of text.
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Nov 22, 2011
Im a Uni student and im having probs with encrypting an image and also the contents of a folder. I have successfully encrypted and decrypted a text file using the following code below.
If anyone could take a look and advise on how to alter my code to perform the task of selecting an image or folder and encrypting it and decrypting it via a secret key that you input within a textbox,
[Code]...
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Sep 29, 2011
I downloaded AxCrypt and encrypted a pdf file. It creates an executable that self decrypts the file if the correct password is entered. This is what I need except that I have to email this self decrypting file - and we all know that exe files get blocked. Are there any self decrypting methods out there that do not use an executable file?
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Apr 5, 2009
I am trying to setup so a user can subscribe to my forums. When he/she does so, it puts them in the nec. group on the forum. This is all easy. Note: I am the owner of the site and the mysql db. So this isnt to decrypt them on other sites.
In short, all of my software will require a login / password to use the programs.
Now, on the mysql, the db encrypts the passwords. How would I go about decrypting it? I read somewhere that its a one way encryption. If this is the case, how does the site know if the password is right or wrong if it cant decrypt it?
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