I have to do one thing : developped a program in VB.netThis program will have two fonctions :The first : -Permit the client to log in the PC.The second :-Count how much time the client use the PC, end send the result to an other PC for proceeding at the payement.By this way, it's necessary to prevent the user to close my application. I can't disable the task manager, because it's very useful for the client when a game crash.I try to hide the process and I succeed, but I don't like this solution, I prefer that the client can see the process but can't close it (and it's very ugly, 'cause we see the process appears 1-2milliseconds in the task manager). So, I want to try an another solution : prevent the user to kill my application like the antivirus do (avira, for example), with a messagebox who said "Access Denied".
I need to write a VB.Net 2008 applet to go through all the fixed-drives looking for some files. If I put the code in ButtonClick(), the UI freezes until the code is done:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click 'TODO Find way to avoid freezing UI while scanning fixed drives Dim drive As DriveInfo Dim filelist As Collections.ObjectModel.ReadOnlyCollection(Of String) Dim filepath As String For Each drive In DriveInfo.GetDrives() [Code] .....
I am writing an application that needs to be running all the time and I don't want the user to be able to close it. I don't want to hide the process from Task Manager. All I need is that when the user tries to terminate the process, he has to enter a password.
So I'm making this program that set my game to low priority to prevent less lag, I got it to find if hl.exe is running and if it is, it'll set hl.exe to Low Priority.
I'm using this code but it seem to not work.
If Process.GetProcessesByName("hl").Length = 0 Then TextBox1.Text = "Waiting for hl.exe" Else
We have 2 apps that we display at once for data entry. 1 taking up the left side of the screen, and 1 taking up the right side.
1 of those apps is the data entry application. The other app is for viewing scanned info. But they can't talk to each other directly.
So I'm creating a tool that runs in the background to intercept certain keys.
I want to be able to capture keys such of Ctrl + Home, Ctrl + Page Up, etc from the data entry application, and send it to the scanned image to rotate it or zoom, etc.
I believe I can do most of it, except 1 part.
Right now if I did Ctrl + PageUp, it will send the key press to both apps. How do I prevent a keypress from the originating application?
am importing the Excel sheet data into Textbox controls based Key Column(WONumber) from application folder where all Excel files resided.if i typed wrong WONumber(Un available file in Excefilesl folder) and clck on load application getting collpased, i wanted to prevent this and just through a message "WONumber is not presente in the Excelfile folder"
Syntax error (missing operator) in query expression 'Wono='. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more in
I have the need to either prevent, or restrict, the termination of a VB.Net application. I have no problem with Admin killing the application, but not a user. I've been unable to come up with a solution for this. Is there maybe even a way to set local policy to prevent termination by non-admin?
I'm creating some software to keep my students on task. I've set it up so that I can control certain aspects of their computer from my computer. Problem is, I'm not sure how to control other applications from my application. I mostly just want to prevent it from being minimized. Some students like to switch screens quickly when I walk by. I would just like to make sure that it is always on top until I specify otherwise. I'm using VB.net, I'm using the 3.5 .net framework for compatibility reasons.
I'm still learning Visual Basic and I'm creating a web browser with basic tab and new window support. My problem is that if new windows are created if the original form window is closed, both windows are closed and the program is quitted. This is to be expected but like any browser the program quits based on the last remaining window open. How would I do this in Visual Basic?
Any way to prevent my application from taking screen shot. I am using this method If Clipboard.ContainsImage = True Then Clipboard.Clear() If this is correct? And also what about screen capture application they take the screen shot without using clipboard what is logic behind it and if there is any way to resolve it?
I am looking for a VB.net book that strings me through the entire development process of an application (Prefered: WPF ,LINQ ,ADO). I have read a few books on OOP and VB.net with small code samples demonstrating the specific idea of the chapter.I think it would be really helpful if there was a book that programmed an entire application that uses a sql database (Northwind , Adventureworks).
I created a server-client application using the asynchronous socket. I found the problem when closing a socket on the server, applications so closed. The procedure that I do to close the socket server is:
Terminate the listening thread. Close the client socket is still connected to the server. Close the server socket.
How to prevent the application is closed, when I close the server socket?
Protected Friend Sub CloseServerSocket(ByVal IPAddress As IPAddress, ByVal socketPort As Integer) ' Terminate the listening thread.
I'm using Process.Start method to launch another application from my application. Until today, there was no problem. But I have tested my application in a different OS, Windows XP (SP3), and my application didn't work right on that. I'm also using arguments to run that application. I guess for some reason my application couldn't send arguments to other application correctly under Windows XP. Maybe it is related to my code. But you should know, it works great on Windows 7.
Im going to make my application require a Serial key(No clue how this works). And how do i prevent jumping messages. My friend said that there most used for getting keys and avoiding key asking.
I know something like this exists, I juts don't know the right word to search about it, so basically I have a cosole application and if it runs twice it crashes. I wanna dispay a message: Sorry app alerady running.I can look at processes and see if my exe is there already running but that's much harder.
I have a GUI with a few button on it and each button start an application. I want to prevent the application to start twice if the user double click on the button. How can I do that?
Am using vb.net windows application.Application containing one process with for and while loops.When i click on stop button then it should stop processing and it should losd gui.
I have written a windows service that is meant to launch a notepad when a specific action happens. The problem i have is that even though the service launches notepad, the actual notepad it self is NOT visible. I know that it has been launced because i can see the process in the task manager. By the way the process is listed as a SYSTEM process rather than a process under my user name (i believe that is because my process is a "LocalSystem" one).
I have access to the source code of a previously created app that work's as designed, but i am looking to update it for further enhance its ability. The change required may be simple in thought and also in design.Basically the app allows you to read in a data file a confirm the data file is in the correct format.Details fo the data file. All lines of the file are 120 characters long. If they are not then there will be an error returned. The fields within the lines have different properties and vaules and the validation on these fileds and lines work perfectly.
1. The first line of the file is always known as a descriptive ( header record ).
2. The next line will outline a detail record. The could be hundreds of these lines.
3. Finally there is a file total record.
A file could be four lines in total or 40000 lines in total. As mentioned the app works when there is one header and total record.I am looking to see if it can be modified.My intention is to merge multiple data files into a single file. There in lies the problem. There is a line in the code as per below.
Do While Not EOF(1)
As far as i can tell this means to go to the end of the file. When there are more than on set of data , there are errors messages generated because the code is looking only for one set of header and trailer records. As mentioned when there is one set of header total records , the apps will validate the file and return any error messages.What i think i need to do is insert another loop/s that say's read data between the header record and the trailer record , if there are any errors display it , then go to the next header / trailer records and display and errors , and continue to do so until you reach then EOF.
I want to add a process to my application, the process should be started to listen some events when the application run. I searched in Internet, and I didn't find answers... Some people said that could use "Application.Run", but I didn't find this function in VB.NET project.
When a button is clicked,my program gets the list of all Drives on a current computer.Then I use String.Concat to merge the drive letter and the rest of the path.So I get something like: "C:" + "somefoldersomefile.some_extension"That creates a full path to a file I am looking for.Then I check if that file exists.If it doesn't exist,I use Process.Start to run the setup file(to install the program I need).It works well and installs the program I need.I want my application,after the installation is finished,to check again if the program is installed and ofcourse confirm that it is.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim DriveList As String() = Directory.GetLogicalDrives() Dim Drive, FullPath, Path1 As String Dim EmptyDrives As Integer
myProcess = Process.Start("something.exe")nd want to start it using button it doen not find the file - i need to execute it from the same folder where application is how can i do that?
I am trying to set up an application process to run an executable, which I include in the project's installation directory, and pass it the necessary parameters; however, I am running into issues as it doesn't appear to be doing anything at all.
Here is what I have:
I define the Process As
Private WithEvents conversionProc As New System.Diagnostics.Process Then I setup the arugments and the process start info as follows: Dim ogrDirectory As String
We have an application that allows custom UI and interaction via SDK. A DLL is developed for this purpose using VB.Net and the SDK. An object variable refers to the application and there are some other object variables for components within the application.
I'm having troubles with terminating an application. When I close the main form everything disappears but the process remains active. I think I know the cause, a certain activeX component will not release properly. As soon as I create one, I can't close normally...
dim someActiveXcomponent = new X() ... <formClosing> someActiveXcomponent = nothing GC.Collect() GC.WaitForPendingFinalizers ' here it hangs
Probably a bug in that component, but the problem is that I don't have much of a choice, I'll have to use that component for now.
Calling System.Runtime.InteropServices.Marshal.ReleaseComO bject( myObject ) will kill the reference and now the application closes properly.
I have a vb application(1) which is made to launch another software(2) with specified parameters, but i wanna keep my application opened as long as the 2nd one is opened too, and I also want to close the second one automatically if mine has been force closed by the user in windows taskmanager, on the desktop, or in any way.
So I need something which detects if windows is closing the program and kill the second application auto.
I would like to avoid the task manager block, because that isn't necessary for this i guess.
