Getting PEB For External Process
Jun 9, 2010
There are tons of examples of how to access the process environment block (PEB) from C++ code but I'm wanting to do it from VB.NET and am seriously struggling.I call NtQueryInformationProcess and get a Process_Basic_Information structure back from that which has a member named PebBaseAddress and this holds a pointer to the PEB (I have verified that this member does hold a valid pointer at runtime). The problem is that when I try to read data from the address that this pointer references I just get nothing. One important thing to mention is that it works fine if I try to use it on my own process, its just when I try and read the PEB for an external process that it gives me no data. I've enabled the SeDebugPrivilege (and confirmed it is enabled for my process in Process Explorer) but this made no difference. I've also tested it on Windows XP x86 as I'm currently testing on Windows 7 x64 but XP had the exact same issue, only sometimes the XP one would just crash completely with a memory access violation and thats the other thing, I am getting fairly inconsistent results - even on the Windows 7 machine sometimes I end up with no data but other times I get memory access violation errors, and other times I get the data for my process even when I have passed in the handle of a different process..
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Jan 29, 2008
We use a 3rd party engineering application that does not expose an automation model. We can 'automate' it after a fashion by using low level Win32 API calls. I can get the Process by iterating the GetProcesses method. Is there a way to attach to the app by using the NativeWindow class?
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Jun 6, 2010
how can i allow resizing of window that doesnt allow resizing,.
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Jun 21, 2010
Constant monitor for process, if process not running execute this()
VB.NET
Imports System.Runtime.InteropServices
Imports System.Diagnostics
Public Class Form1
[Code]......
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Jan 7, 2012
So i want to start an application with my vb.net app and it should start as a hidden process, meaning no window and nothing in the task bar, only in the task manager ofcourse.
This is what i do
Dim fov As New Process
If CheckBox2.Checked = True Then
RichTextBox1.Text = RichTextBox1.Text & vbCrLf & "* - Launching"
fov.StartInfo.FileName = ("test.exe")
[Code]...
This does not work.. I have also tried the "fov.StartInfo.CreateNoWindow = True" command which does not work either. I can live with a solution that would start the window minimized instead of totally hidden.
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Apr 30, 2011
I am currently working in a very large solution (120+ projects). Very often, we need to find a particular form in a large desktop application, consisting of hundreds of forms. For example, we might have a requirement to edit some controls on a certain form.We don't know the form name, but we know how to navigate to the form when running the application.
In order to identify a form, we currently try to find some unique text on the form, and then search all the source files for this string. That's not very cool.Instead, I'd like to make a little tool that can identify the source file for a form, or at least the name property of the form object. We can't add code to the solution itself, so we will have to make an external exe.
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Jul 7, 2011
Is it possible to run a external program/process example notepad in thread of you vb application?
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Aug 4, 2009
I'm using Process.Start to start an external command line application and using the StartInfo.Arguments method to send parameters to the application. I imagine I'll need to use a loop... but I can't figure out exactly how yet.I need to send anywhere from 1 - an infinite number of files names to this application. Each file has to be sent one after the other. So once the first one is done, I need to loop back around and past the second one.I can probably use the Directory.GetFiles method to get all of the files, but I don't know how to assign them.
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Jul 15, 2010
I'm trying to run the "Shell" command in a VB.NET project, to execute an external file. For example: Shell("c: empmyfile.txt").
For some reason this throwing a "file not found" exception, yet the file is there. Now I've looked around and found that others recommend using the "System.Diagnostics.Process" method, which does work, however I don't want the file to run in-process, which is what that does.
I want to run the file out of process, so that when my program ends, the executed program keeps running independently. Hence my attempt to use Shell() but it refuses to work.
Is there another way besides Shell() to run a file out of process?
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Jun 4, 2009
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).
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Feb 3, 2012
I wanted to know if it is possible to Zip a folder without any external dll nor any external references - just with native features.I've been able to Zip files with System.IO.Packaging, but it does not include folders and I cannot tell it to Zip the parent folder.I know there are external dll and so, but I'd like to know if it's possible to make it from a native way.
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Mar 23, 2012
I want my vb.net dll to get the data sent from c++ project(exe).Can any body help on in what form this void pointer can be sent via pipe. The void pointer corresponds to enums or structures. I have to get this structures/enums on the vb.net dll end. I have mentioned about using pipe. My question is as what type the pointed to data can be send over the pipe so that I can easily handle the received data at the vb.net dll end.
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Oct 13, 2009
i am trying to write a little program that checks for a process and kills is.here is the
Dim p As Process = Process.GetProcessesByName("Cheat Engine")(0)
p.CloseMainWindow()[code]...
My problem is it�s woking ,yes if the programm ,,Cheat Engine" is running the process is getting killed.But if the program is not running my program crashes.
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Sep 9, 2011
I'm executing a remote process using WMI and would like to redirect the StandardOutput of that process back to my program. I have found these code examples:
[Code]...
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Sep 1, 2009
I am getting an error with this code.
The process cannot access the file 'C:UsersdavidDesktopTest Folderdavid 2.xml' because it is being used by another process.
how do i end the prosess after I create the file? Or am I creating it in the wrong manner.The underlined line is where the error ocures.
Public Sub AddDTData(ByVal value1 As String, ByVal value2 As String, ByVal filename As String)
dtUser.Rows.Add(value1, value2, Now.Date)
If My.Computer.FileSystem.FileExists(filename) Then
[code]....
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Sep 27, 2010
How to get full path of current directory of process from where process starts Like if i use my software to start somefile then I want my software to know where she started it from ( files path) What I mean is the file I opend using my softwares location.
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Sep 28, 2010
My app starts an On-Screen Keyboard process like this:
Dim PID as System.Diagnostics.Process
:
PID = Process.Start("C:WindowsSystem32osk.exe")
:
[CODE]...
It seems to work 90% of the time. However, sometimes the PID.Kill() fails because it says the process already exited. At this point the OSK is always still there on screen. Yes, I know my code should be testing to see if the process is still running before trying to kill it, but given that the OSK is still on screen..
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Feb 21, 2011
I have a program that starts another program after setting the regkeys basically the program continually syncs the calandar of outlook and another application.I set the regkeys than launch the c:sync.exe app. I have tried a simple process.start and launching the process as a thread and they both do the same thing: The other process starts and works as it should but my main program goes "White screen" or "not responding" until the process.start has exited.
I want the process.start to run in the background so if users click in my main app it responds and truly that they can access the context menu of my main app from the taskbar while the process.start is running.
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Apr 24, 2011
i want a code that if a process that i picked is no match in a process list that process that i picked will start
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May 27, 2010
Trying to create a button that when clicked will check to see if a certain process image is running and if that process is running give the process focus. If the process is not running then start the application.
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Nov 19, 2011
I am working on a small VB application that listens for commands sent from an Android app.
One of the functions is to extract an archive. I am familiar with how to listen for the unrar process to finish, so I can display a progressdialog on the phone while the extraction is happening, and clear it as soon as it's done.
BUT ... if there is an error/alert from WinRAR, WaitForExit() never gets called because WinRAR is still sitting there open until I click "OK" on the MsgBox.
For Example ... if you try to extract a file that is not actually an archive... an alert will pop up saying "No Archives Found", and basically everything is halted on the VB app and the Android app, and the Android app just sits on a progressdialog saying "extracting..." until you manually hit "OK" on the computer.
As you can imagine, this is a problem if the whole point of your app is to NOT have to go over to the computer.
So... I am wondering if there is something similar to WaitForExit() that will wait for an error and allow me to close out the alert and let the process end.
Here's my Sub for the UnRar command:
Private Sub UnRar(ByVal WorkingDirectory As String, ByVal filepath As String)
Dim objRegKey As RegistryKey
objRegKey = Registry.ClassesRoot.OpenSubKey("WinRARShellOpenCommand")
[Code]......
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Feb 10, 2009
I have an issue using Process.MainWindowTitle,Process.MainWindowHandle on some older VB6 applications. After Process.Start I use Process.MainWindowTitle to display in a listbox. The MainWindowTitle returned is not the Window Title but in fact the Project name of the VB6 exe.? I also store the MainWindowHandle to use the ShowWindow and SetForeGroundWindow API's. It would appear that the ShowWindow API does not work, but the SetForegroundWindow does. ie: if the VB6 app is minimized, showwindow does not restore, if it is NOT minimized setforewgroundwindow sets it to the foreground. The exact same code does work correctly for any other .net exe or notepad, only on these vb6 programs I am having a problem.
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Sep 13, 2011
I try to open a text file and write in some text, when i run the program it says the following error:The process cannot access the file 'D:VB projectsCategory_Characteristics.txt' because it is being used by another process.
THe code is as follows and the error hits in line :
Dim objWriter As New System.IO.StreamWriter(FILE_NAME)
-----------------------------------------
Dim FILE_NAME As String = "D:VB projectsCategory_Characteristics.txt"
[code]....
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Feb 27, 2012
I was wondering if this code could be better optimized for multithreading. What it does is open a process and loops through the data, there could be any range of files to open (so I would like to have say 2 or 3 processes at once):
[Code]...
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Feb 13, 2012
I have a procedure (parent process) that starts several processes (child processes). The child processes calculate several array variables. How can I pass those arrays to the parent process? At the moment, the child processes write the arrays to a streambuilder and the parent process reads the stream. Is there a better way to do it? Is it possible to have the child processes write to RAM memory and have the parent process read from there? It is like declaring a global variable in the parent process and give the child processes access to it.
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Aug 31, 2009
How can i access a file through FileStream which is being used by a window service. Actually i am trying to access a file which is also being used by our window service. I need to read data from this file. I am using below code but also getting following error:
Code:
Dim fs1 As IO.FileStream = New IO.FileStream(psPath, IO.FileMode.Open, IO.FileAccess.Read, IO.FileShare.Read)
Dim sr As IO.StreamReader = New IO.StreamReader(fs1)
sData = sr.ReadToEnd
Error: The process cannot access the file 'FILENAME' because it is being used by another process.
I tried changing FileShare.Read parameter to FileShare.None but it didn't work out. I also read below post which says that it is not possible but i think there is a way to read it like if you open a file through Firefox but still window service is accessing it.
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Aug 8, 2010
Whats happening is I run the code below and get the following error "The system cannot find the file specified". I've read that with UseShellExecute set to false that you can't use WorkingDirectory.
Dim Password As String = "password"
Dim SecureStringPassword As New System.Security.SecureString
For Each c As Char In Password
[Code].....
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Oct 27, 2011
I am working with saving and deleting images. What i really want to do is check and see if an image exists in the destination folder and if it does automatically overwrite it. i couldnt figure that out so i figured i would look to see if the file was there if it is Delete it then write the new file..The issue is i keep getting this error.The process cannot access the file "FileName" because it is being used by another process. [code]
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Dec 8, 2011
How would I go about starting a new process without it being the child of the calling process.
Example:
Main Program (Caller.exe)
process.start("file.exe")
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Apr 29, 2011
VB.net 2010 Read all around the net, but cannot seem to do this: Tried the performance counter Categoryname=process Instancename=("program"). _Total helps in part- but it would be more efficient to acquire the main applications cpu usage for this project.
Code:for each p as process in process.getprocesses if p.id=process.getcurrentprocess.id then end if next 'Values, Obviously multiple processor cores have to be taken into account'kernelmodetime, usermodetime, Cputime, total cpu time, 100% <-- Does this involve adding and or dividing all these times? I need the current process CPU usage.
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