.NET - Enumerating The Handles Not Windows Of A Specific Process?
Oct 16, 2009
I have some code designed to locate a specific process based off of its window text, gather the main handle, and then all of the child windows. However, I have run into one problem. I cannot seem to gather all the handles and their respective text. For example, when I test my program and do a handle count on the specific process, it tells me that there are more than 400 handles for this one process. How do I get the handle pointers for this process and also gather the text associated with these handles.I have included my source code for reference.
Code:Public Class Form1
Const GW_CHILD As Integer = 5 Const GW_HWNDNEXT As Integer = 2 Const WM_GETTEXT As Integer = &HD Const WM_GETTEXTLENGTH As Integer = &HE Const BM_SETSTATE As Integer = &HF3 Const WM_LBUTTONUP As Integer = &H202 Const WM_LBUTTONDOWN As Integer = &H201
[code]....
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Aug 30, 2010
I have some code designed to locate a specific process based off of its window text, gather the main handle, and then all of the child windows. However, I have run into one problem. I cannot seem to gather all the handles and their respective text.
For example, when I test my program and do a handle count on the specific process, it tells me that there are more than 400 handles for this one process. How do I get the handle pointers for this process and also gather the text associated with these handles.
I have included my source code for reference.
Code:Public Class Form1
Const GW_CHILD As Integer = 5 Const GW_HWNDNEXT As Integer = 2 Const WM_GETTEXT As Integer = &HD Const WM_GETTEXTLENGTH As Integer = &HE Const BM_SETSTATE As Integer = &HF3 Const WM_LBUTTONUP As Integer = &H202 Const WM_LBUTTONDOWN As Integer = &H201
[code]....
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Nov 30, 2010
i'm making a little app in which i need to enumerate all the windows of a specific process. i managed to do that but through enumerating all the windows in the system and then just test if it is the process i'm talking about or not by using
[Code]....
but this method seem to take a lot of unnecessary time. is there a wind32 function that can allow me to enumerate the windows of a specific process giving its handle.
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Mar 7, 2010
I'm using the namespace System.Diagnostics. I need to check if there is a Windows process called "gospeakx.exe". If exist the "gospeakx.exe" process, end it. Does anyone know how I can do this?
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Feb 15, 2012
(How to get The Handles Of process?)
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Jan 20, 2012
How do I get the list of open file handles by process id in C#?
I'm interested in digging down and getting the file names as well.
Looking for the programmatic equivalent of what process explorer does.
Most likely this will require interop.
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May 8, 2009
We needed an inter-process reader/writer lock.We decided to use a file and lock the first byte using LockEx and UnlockEx. The class creates a file in the system temp folder when it is created. The file is created with readwrite access and share read|write|delete.We also specify DeleteOnClose so we don't leave loads of temp files laying around. Obviously AcquireReader and AcquireWriter call LockEx with appropriate flags and ReleaseLock calls UnlockEx.We have tested this class using a small application that you can run several instances of and it works perfectly. The application that uses it has a problem, which we have managed to re-produce in another small test app. In pseudo code it is
Create InterProcessReaderWriter
Dispose InterProcessReaderWriter without acquiring any locks
Launch a child process which takes a reader lock
The first time this runs, it works fine. If you attempt to run it again, while the child process from the first time is still holding the lock, we get an UnauthorisedAccessException when trying to open the file.This appears to be a permission issue, not a sharing violation but all the processes in this test case are running as the same user.
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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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Sep 9, 2010
I've been using Shell() to launch an application, and Process.GetProcessById() to get the handle to that window, but I think I'm running into problems when passing the handle around to various functions. What is the best way to declare and pass windows handles so that they will be usable? After viewing the debug, it seems the Shell() and Process.GetProcessById() work fine. After I pass the handle off to the functions I need to use them in, the program starts spitting out garbage, and not doing what I want it to do. Short version of the proces
[Code]....
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Dec 22, 2009
I am trying to control an external application using visual basic. I have spy++ in order to get the windows handles of all the tool bars/buttons etc. Can someone refer me to some code/ tutorials on how i can control the application. I will need to perform mouse clicks (ex clicking file>open) and sending key strokes in that application.
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Sep 8, 2009
I need to make program that gets handles of two opened windows that have Same Class and Title. Only difference between them is its positions. And, after I get handles I want to SetForegroundWindow to make windows active when I need to.
My problems are:
a How to get handles of thouse windows (is it possible to do it by WindowFromPoint, since I know positions)?
b How to make thouse handles global after they are determined or pass it to the next Sub?
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Sep 11, 2009
How to inject a DLL on a specific Process?
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Jun 22, 2010
I need to kill a specific process, i got ListBox1, and Button1 and Button2
Button1 Gets Process which is notepad, When Button1 is clicked in the ListBox1 it shows the Main titled of the windows, Example Notepad is running and his title is Untitled - Notepad in Listbox1 will show the title, And the Button2 Should kill the process of the selected item in the ListBox1, Like i Got 2 Notepad open, 1 with titled 1 and other with title 2, when i select in ListBox1 the one that says 1 and i click button2 it should kill the notepad process that have the titled 1 no all the notepads.
Button1 Code
Dim iGet() As Process = Process.GetProcessesByName("notepad")
Me.ListBox1.Items.Clear()
[Code]...
But it closes all notepad process, not even selecting the iem from ListBox1 and then Button i need it..
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May 26, 2009
I have created a Windows service in VS 2005 that monitors a folder for XML files, reads some data elements from the XML using XmlDocument, then copies the files to another location. I find that when I drop 2 or more XML files into the folder simultaneously, it processes them with no problems, but when I drop the same files into the folder one at a time, I will get an error on the second file: "The process cannot access the file <my file> because it is being used by another process." If I stop my service, restart it, and drop the second file into the folder again, it works the second time. I am confident that no other program is accessing this file at the same time as my service. My impression is that the processing of file # 1 is somehow not releasing all of the resources, leading to the processing of file # 2 mistakenly thinking that it can't access that second file.
Dim FileWatcher As New FileSystemWatcher()
It points the watcher to my folder, sets up an event handler, then enables the watching:
FileWatcher.Path = InputFolderPath
[code].....
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May 7, 2009
I am trying to write a Windows Script that will allow me to monitor the following: That 2 x seperate but specific processes within Component Services "Running Processes" list are currently running and have not reset within the past hour. If I already know the PID, then I can retrieve the CreationDate (I assume which I can use to check for restarts? or is this the actual process creation/installation date) for each specific process, however if a restart occurs the PID will change and my script needs to know what the new PID is without me telling it!
[Code]...
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Aug 2, 2011
I have developed a Windows Service in VB.Net (VS2010) which is running on Windows7. I am trying to get "MainWindowTitle" for processes thru their process object but it returns empty.
[Code]...
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Jun 25, 2010
if there was a bad virus on my computer and I wanted to make sure that every time that the Application tried to run, I would Kill That Process? Something that Might Look like this, but Idk..
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Timer1.Interval = 1000
[code]....
Something that looks like that, yesterday I got the code on how to Kill a process by name, today I would like to learn how to ask the computer if that process is running, and if it is, Kill It.
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Nov 8, 2010
How can I get the CPU usage for an individual, specific process? I know how to get the total CPU usage, but not for 1 process. What I ultimately want to do is list all the processes whos cpu usage is greater than zero.
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May 18, 2012
I'm printing pdf files via the below code in a service. In Windows 7 this works really well, In Windows Vista, nothing happens at all? What am I doing wrong?
[Code]...
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May 16, 2012
when i am selecting form the xaml file a button and then tap event from the right (in order to set the tap event) it auto generates this sub :
[Code]....
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Aug 17, 2011
I've created a very simple form with one button on. I need it so when the form runs, it opens in the bottom right hand corner of the screen regardless of the resolution. It also needs to be always on top of all other applications.
When the buttons pressed, i need it to close all iexplore instances and reopen a fresh instance.
I've tried to search for the answer but to no avail.
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Jun 22, 2010
If I had 5 text boxes on a form, TextBox1...TextBox5, is there a method to do something like this?
Dim strFld As String
For intFor = 1 to 5
strFld = "TextBox" & intFor
Me(strFld).Text = intFor
Next
It doesn't like the line of Me(strFld) but I figure there must be a way to reference a field via a variable instead of hardcoding the field name.
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Apr 24, 2012
I was looking for a way to enumerate String types in (vb).NET, but .NET enums only accept numeric type values.
The first alternative I came across was to create a dictionary of my enum values and the string I want to return. This worked, but was hard to maintain because if you changed the enum you would have to remember to also change the dictionary.
The second alternative was to set field attributes on each enum member, and retrieve it using reflection. Surely enough this worked aswell and also solved the maintenance problem, but it uses reflection and I've always read that using reflection should be a last resort thing.
So I started thinking and I came up with this: every ASCII character can be represented as a hexadecimal value, and you can assign hexadecimal values to enum members. You could get rid of the attributes, assign the hexadecimal values to the enum members. Then, when you need the text value, convert the value to a byte array and use System.Text.Encodings.ASCII.GetString(enumMemberBytes) to get the string value.
Now speaking out of experience, anything I come up with is usually either flawed or just plain wrong. Is there any reason not to do it like that?
As pointed out by David W, enum member values are limited in length, depending on the underlying type (integer by default). So yes, I believe my method works but you are limited to characters in the ASCII table, with a maximum length of 4 or 8 characters using integers or longs respectively.
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Jan 13, 2011
I am trying to write a simple linq query from a tutorial I read. But i cannot seem to get it to work. I am trying to display both the address in the attached xml document, but can only display the first one.
<?xml version="1.0" encoding="utf-8" ?>
<Emails>
<Email group="FooBar">
<Subject>Test subject</Subject>
<Content>Test Content</Content>
[Code] .....
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Apr 17, 2008
I am trying to get the AD Properties from a Search that I do. When I do so I get this as a result "System.DirectoryServices.ResultPropertyValueCollection". How do I get the value? I know that it is a collection but everytime I try I am not successful.
Code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSearch.Click
Dim resEntry As SearchResult
Dim lstItem As New ListViewItem
Dim currentEntry As New DirectoryEntry
[CODE]...
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Apr 3, 2009
I'm having trouble with program I'm writing for work. It's basically a GUI for some remote management scripts I wrote a while back.I have a listbox (listbox1) to which loads a list of computers from active directory, which works perfectly and quickly.The problem is that I also want to add to another listbox (listbox2) a list of machines 'currently active' on the network. I can't see an easy way to do this in .net but came up with a logical solution.Basically my thought was to 'ping' all of the machines in the directory listing and use the results to make the list...
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim de As New DirectoryEntry()
[code].....
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Jan 7, 2010
Is there a way to write a single routine that could enumerate a list regardless of the data type? I am trying to write a custom XML serialization class and it would be great if I could enumerate all items in a generic list the same way, regardless if it was of type String, Integer, etc.
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Jun 27, 2011
Is there a way to list the text that appears in each of the tabs of IE8 and Firefox as part of the list of running processes along with the handle.I can list all the running processes fine with their hwnd's but I cant list all of the tabs that are open in either IE8 or Firefox, only the active tab
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Oct 26, 2009
I need to enumerate all the items in an email inbox. However, this code fails
For Each MI As Outlook.MailItem In folderToProcess.Items
'Console.WriteLine("Subject:" + vbTab + MI.Subject)
Console.WriteLine(MI.Subject)
Next
It fails whenever it comes across an item that ISN'T an email (e.g. a meeting request). I've spent the last hour or so trying to find a way of enumerating every item no matter its type. So far all I've come up with is to use the base Object type and then work from there but that's Late Binding and I'd prefer to avoid it if possible.
Has anyone come across this problem before? How can I determine what type of Outlook item it is during enumeration?
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Sep 24, 2011
As part of my application I am hoping to be able to get the user to enter their IP address and subnet mask which will then enumerate all of the hosts in between which can then be scanned for various open ports/applications installed.
For instance, With a network of 10.91.100.0/255.255.255.252 hosts are valid 10.91.100.1 - .2
How can this be done in vb.net? I would assume also some error checking would need to be put in place to confirm as to whether the subnet mask was valid as well?
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