Reading Memory From An Application Don't Own In C++
Jan 26, 2012
A couple of months ago, before I started learning C++, I made an application in VB.net that reads memory from an external program. This could be anything, from notepad to windows media player etc. I have been trying to find a way to do the exact same thing in C++, but to my suprise I can't find anything straightforward on the subject. All google comes up with is threads on several forums, where the general response is "Windows doesn't allow you to read from memory you do not own". But if it works in VB.net, it can work in C++ too.
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Dec 10, 2011
I have a little code here, but it is not working. When I try to run this then it says that "the index was outside the bounds of the array".[code].....
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May 1, 2012
How is this possible?
For example, the following address: "00775BD7" shows
How HP has a player in the game Counter Strike 1.6
So how do I get the value?
If it is not clear;
I want to read only
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Aug 10, 2010
I'm currently developing a sort of community program that logs game things to their profile.
Let say... you are playing BioShock PC, you passed a checkpoint... but when you passed checkpoint the game needs to trigger a notify to my program that tells that the gamer has passed that specific checkpoint.
Is it possible to read it from the game's memory or do i need to modify the game's executable?
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Jan 28, 2011
can someone help me with code to read data that has been sent to a printer. for example a receipt that has been sent to a printer by a closed application. i am trying to intercept the receipt at the printer and then sent the data elsewhere. i am dealing with an application for which i have no source code and i trying to get data that is being generated by each transaction.
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May 4, 2009
I'm trying to pass a business object from one WinForm to another WinForm for modification, and then repopulate the text boxes, etc. on the first form with the updated values.However, it seems that the object values set in the second form are not "sticking" when the code control returns to the first form.Is there a way to view the memory location of an object in VB.NET? I want to first make sure that the object variable on the second form is pointing to the same memory address as the object on the first form. Then I can take it from there.
In a separate VB project, I passed a simple object to a second form, modified the values, and re-displayed the object's values on the first form. It worked fine. In my real app, I'm passing an object that is a property of another object, which may be why it isn't working.SOLUTION: The problem was that I was using a DeepCopy() function that I found to simplify copying the properties of one object to another. Removing that function and manually setting the values to the passed object on the second form (ex. obj.property1
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Jun 5, 2010
im trying to read "calculator" from calc.exe, now i found the mem adress where the value resides but i have a few problems
1) how many bytes should i read? im not just talking about calculator string but potentially any length string, i get different results with 4/8 bytes but same from 8 - 32 bytes
2) when i read i get a long value 27866486557179971 but how to convert that into a string
EDIT: ok by staring at the return value long enough i discovered that when i convert it to hex it spells "calc" backwards, same for all other strings, i could build a working converter based on that knowledge but now what bugs me is where is "ulator" or the rest of the string, the most i can get is always 4 letters
EDIT2: oh nm that, by moving memory adress a step further i get the next letter along with 3 previous ones and still backwards but i can work with that
ok so now next step would be making a search function for which i need to find out the range of memory to scan, anybody know how to do that?
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Sep 1, 2010
I saw some 'offsets' such as: 0x006E71A0and some that were like, Game.dll+8E336CI'd more so think the 0x006E71A0 and the Game.dll+8E336C are among the same format, so i'd like to use that.I have also read somewhere(this could be wrong) that the memory addresses formats are different between VB, C#, and C++.
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Dec 31, 2009
I'm basically reading a memory address of Notepad using a module I got from a example... Then I'm displaying the text value of the memory address in a MsgBox. Everything goes well, I'm able to retrieve the text value and everything, but this happens.Lets say the value of the memory address is "Notepad". When the MsgBox comes up, it comes up a lot of times, displaying it like this...
1st MsgBox displays "N"
2nd MsgBox displays "No"
3rd "Not"
4th "Note"
and so on...
Here's my code, Module first, then Form1 code.
Module1.vb
Module
Module1
Private
Declare
Function
[Code] .....
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Aug 15, 2009
I am using these API functions for my project where I am handling 3 unmanaged DLLs of two external apps, basically all it does is to carry data back and forth between these external applications. The project needs a lot of use of pointers, passing pointers and reading/writing to memory so both applications can talk to each other.
Declare Function HeapAlloc Lib "kernel32.dll" _
(ByVal hHeap As Long, ByVal dwFlags As Long, ByVal dwBytes As Long) As Long
Declare Function HeapCreate Lib "kernel32.dll" _
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set of windows API functions for allocating memory, reading and writing to allocated memory, and other required functions to generate required arguments to pass to these API calls?I am up to where I am allocating memory and getting pointer, but I don't know how to go about reading, writing, passing pointers, finding data lengths and reusing memory.
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Jan 20, 2010
I've made a screen capture program, and I have a program to play back the captured clips (right now there's no sound). All of the data is stored like so:
[Code]....
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Jun 22, 2012
How do I find the memory or CPU used by my software?
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Oct 19, 2011
I am working on a desktop application in VB.net 2005. The application contains a timer with an interval of 1 min. Each time the timer ticks, a set of functions gets executed, mostly database related.Initially the application runs fine. In processes(Task manager) the cpu usage goes to 100% every time the timer is invoked. But the timespan is around 1 sec(negligible).However as the time passes and after around 20 hours the time span of timer_tick increases to something like 20-30 secs. In this period cpu usage is 100% and the application does not responds. Gradually the time span of timer_tick increases to 1 min and the cpu uses gets stuck to 100% and the application does not responds.All objects are properly disposed. Moreover, this issue is with pentium 4 processors. The application runs fine on core 2 duo.[code]Many Select, Update and delete queries are performed in the timer.This problem occurs when I am using around 7000 records in database.
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Oct 19, 2011
I am working on a desktop application in VB.net 2005. The application contains a timer with an interval of 1 min. Each time the timer ticks, a set of functions gets executed, mostly database related.Initially the application runs fine. In processes(Task manager) the cpu usage goes to 100% every time the timer is invoked. But the timespan is around 1 sec(negligible).
However as the time passes and after around 20 hours the time span of timer_tick increases to something like 20-30 secs. In this period cpu usage is 100% and the application does not responds. Gradually the time span of timer_tick increases to 1 min and the cpu uses gets stuck to 100% and the application does not responds.All objects are properly disposed.Moreover, this issue is with pentium 4 processors. The application runs fine on core 2 duo.
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Oct 9, 2009
I'm using VB.Net, and I have a set of data which I have to able to filter through fairly quickly.Basically, the program is like google sugest, but instead of a drop-down menu, I'm using a listbox. When a user enters a word, I compare the word using LINQ and filter those that contain the user's input. The data are all strings of variable length (from 0 to 200 characters, most on 150 character mark), and I have 240,000+ of this strings and counting- all stored in an XML file.
A colleague of mine told me that loading all of that to memory (using VB.Net's XML serializer plus collections of string/objects) is not practical, and would slow the 'startup' time of the program. I haven't finished building the program yet and I'm having second thoughts about continuing this path.
So, my question is: Should I continue with my current approach on the problem (which is load everything to memory on startup), or is there a better way of solving my dilemma?
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Oct 6, 2009
screenshot application I am developing that has a memory leak somewhere. The main code is as follows:
Public
Class Form1
Dim strPath As String = "C:windows empscreenshot.jpg"
Private Sub Main()
[code].....
The application runs from the system tray and a clickevent handler for the notifyicon control calls the Main() sub. The code calls OutlookEmail() which creates a new outlook mail object. The problem is that each time the notifyicon in the system tray is clicked the memory in use jumps up incrementally - about 3mb each time.
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Jun 17, 2012
I have a problem with a memory leak in a very large ASP.NET application. After about 24 hours of usage (sometimes a lot more) an OutOfMemory exception is thrown. Therefore I am trying to understand how managed memory works in .NET. When does an ASP.NET application throw an OutOfMemory exception? The server has a lot of RAM and there is always plenty of memory left when an OutOfMemory exception is thrown. I understand the difference between virtual memory and physical memory. How much memory does the W3WP process have to consume before an OutOfMemory exception is thrown? Is there a setting somewhere e.g. in the Machine.Config file? The ASP.NET process is never recycled.
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Jun 6, 2010
is it possible to monitor my RAM-memory use of my application using a PerformanceCounter? If so, I've been looking around on the web, but my knowledge about memory isn't enough to understand what precisely I have to use
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Sep 24, 2010
I am working on VB.net multiuser application and when ever my any form open up memory rise and after some time out of memory exception is come.
I am working on VB.net 2008 and sqlserver 2005. I have use very much of shared object so second time it memory allocation is less, but how i can reduce it when form is close or not in use. can i use Garbage collector or Dispose and how i use this functionality ?
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Mar 31, 2011
I have an application that uses many forms and a couple of modules. One module modMain contains my subMain that starts the application. In subMain an instance of frmMainMenu (insFrmMainMenu) is created with a menubar. As the user selects an item from the menu bar, an instance of a specific form is created (for example insFrmViewCustomer). That instance is opened with the ShowDialog method. When the form insFrmViewCustomer is closed, a statement in insFrmMainMenu disposes the instance of insFrmViewCustomer. modMain also contains many public functions and subs, as well as public variables. The other modules contain public functions and subs.
So, What is loaded into memory when the application starts?
And Is there a tool within Visual Studio that tells me the answer to the first question?
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Feb 12, 2012
I have a small-scale WPF application using VB.net as the code behind and I want to add certain features, but i'm concerned about performance.
1) My app interacts with a third party database to display "realtime" data to the user. My proposed method is to create a background worker to query a database every 30 seconds and display the data. I query about 2,000 records all long integer type, store them in a dataset, and then use LINQ to create subsets of observable collections which the WPF controls are bound to.
Is this too intensive? how much memory am i using for 2,000 records of long int? Is the background worker querying every 30 seconds too taxing? will it crash eventually? Will it interfere with the users other daily work (excel, email, etc)?
2) If an application is constantly reading/writing from text files can that somehow be a detriment to the user if they are doing day to day work? I want the app to read/write text files, but I don't want it to somehow interfere with something else the person is doing since this app will be more of a "run in the background check it when I need to" app.
3) Is there a way to quantify how taxing a certain block of code, variable storage, or data storage will be to the end user? What is acceptable?
4) I have several list(of t) that I use as "global" lists where I can hit them from any window in my application to display data. Is there a way to quantify how much memory these lists take up? The lists range from lists of integers to lists of variables with dozens of properties. Can I somehow quantify how taxing this is on the app or the end user?
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Oct 20, 2010
I ran my console app succesfully 30 minutes ago. Added a single line to write a message out to the console, recompiled and now, when it runs, it eats up all the available memory before bombing out with an OutOfMemory exception! I can see the Memory Usage in Task Manager just rocketing up!
What on earth could be wrong? I can reboot the machines I am running this on as they are live servers.
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Oct 15, 2009
I have an application which I've developed which queries Active Directory information and stores about 15 properties into a Datatable which is kept in memory. I need to decrease the amount of "Commit" memory it is setting aside. The application stays active in the system tray and allows for quick searching of information along with pictures for users. I have a class, which is able keep memory usage down pretty low. It runs on a timer every 10 seconds and listed below:
[Code]...
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Jan 27, 2010
Does a the size of the class affect the memory usage of the application? is it better to break big classes into smaller classes or just group them up into one big class.
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Dec 15, 2010
what is the best way to identify memory leaks from a vb.net 3.5 windows application.
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Apr 13, 2010
An application that has 3 Webbrowsers instantiated at design time navigates to webbrowser2 15 times every minute with a different webpage. Webbrowser2 is disposed of after each web page is received and processed. The size of the private application memory continues to grow as when the disposal was not instigated. The application memory grows to 1GB and then the program stops responding. Any suggestions? [Code]
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Jul 15, 2011
I am getting a System.OutOfMemoryException from my vb.net application, it happened from one certain user. I am trying to figure out whether my application takes too much memory space or the PC has low memory. But she just upgraded her desktop as i3 Intel CPU and higher memory.
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Apr 19, 2011
Have been running this application on 8 PCs since January.My application uses variations of this
Dim Artist4_TBD As New DataView(Me.SSPE_InterCOMM1DataSet.SSPE_ArtScheduler)
[Code]...
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Dec 14, 2011
I have developed a application on vb.net platform. After installing, whenever I run the application and close it, it stays in the memory and pops up again after approx 5 mins.
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Jul 30, 2011
We are trying to communicate between our two applications, One is in VB.Net and the other one is in ruby. We can easily communicate between two .Net applications but how to communicate between a .Net and ruby application? [code] After creating the Memory Mapped File through the above code how can we read/write it in ruby?
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