.net - Get The Memory Address Of A Byref String Reference?
Mar 15, 2011
I am experimenting with more effective ways to generate forms. My experiments goes into the possibility to link strings, and other types, directly by their class reference and use it to update the original values without any strongly typed code.
I have been using GCHandle.AddrOfPinnedObject to get the memory address of the string, but it gives the the memory address of the string data, not the string class/reference that i need to change to allow me to use this approach.I am aware that strings are immutable and can not be changed (Actualy, you can, but its not recomended), but I do not want to change the actual strings, but change the reference to it (the string object).Is there some other way to get the address of a string object reference?
[Code]...
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May 21, 2009
searching through memory at a given address range, and match a string of bytes specified i.e.
FindArrayOfBytes(Byval str as String, Byval range_start As Integer, Byval range_end as Integer) As Integer
The function should return the address start of where the array of bytes was found.
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Jun 6, 2011
I have a function that accepts a String by reference:Function Foo(ByRef input As String)
If I call it like this:
Foo(Nothing)
I want it to do something different than if I call it like this:Dim myString As String = Nothing Foo(myString) Is it possible to detect this difference in the way the method is called in VB .NET?All the logic is in the second overload, but I want to perform a different branch of logic if Nothing was passed into the function than if a variable containing Nothing was passed in.
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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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May 22, 2009
What's the best way to monitor a specific address in memory? And is it possible in theory to block a certain address being written to?
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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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May 9, 2010
read and write on other process float memory address w/ pointers and offsets
i do have a module well it works with 4bye and long but for some reason it doesnt work with float address
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Nov 5, 2011
I want to know on how to scan for the memory address by using its value.I am developing a small app that acts like a advance process viewer that shows all the address with the same values in a program.....
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Jun 22, 2009
I need to make a program for my school (I`m the principal), that reads the text in the memory address of the program and write it down in a txt. I already have the address numbers. For more information, I use VS 2008.
I was trying to make one code to get the memory address. So, after I succeed this, I'll make the correct program.
The code I made(adapted from [URL] returning-0 ):
Public Class Form1
Private Declare Function ReadProcessMemory Lib "kernel32" (ByVal hProcess As Integer, ByVal lpBaseAddress As Integer, ByRef lpBuffer As Single, ByVal nSize As Integer, ByRef lpNumberOfBytesWritten As Integer) As Integer
[Code].....
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Jun 20, 2009
I need to make a program for my school (I`m the principal), that reads the text in the memory address of the program and write it down in a txt. I couldn`t find a professional here in my city so, I already have the address numbers. For more information, I use VS 2008. I was trying to make one code to get the memory address, and after I succeed this, I'll make the correct program.
[Code]...
1. It only gets the first 4 bytes(is it?) of the memory address. I want it to get all of them.
2. I haven't discovered how to convert each byte(?) into a character. Is there a function for this?
3. When the program runs, after clicking ok on the MsgBox, it highlights the Next and debuggs:
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
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May 22, 2011
Lately I have been making a program (I guess you could call it a trainer), which would read the process memory to get the character's coordinates in a game. It later makes a simple map and show it in a separate windows. I built this program in VB.net, and it works surprisingly well. The only problem is the fact that the memory address where the coordinates are stored, changes every time I restart the game. Could someone please help me find a way, for the program to find the correct address by itself? If it helps, the game I am referring to is Minecraft.
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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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May 30, 2010
Ive basically got 2 problems I need to solve.1) I am trying to determine if a certain process is running on the user's machine at the same time as my program.2) I am also then,if the process is running, trying to edit a specific memory addresses value. I have already found the memory addresses for the program, but how do I tell VB.Net to basically read the current value stored in that memory address, and then write a new value to that address
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Jun 7, 2010
Is there a way to get my own process' memory range? For example, I want to read all memory of my own process:
[Code]...
But I always get an AccessViolationException, because, of course, I'm using IntPtr.Zero instread of my own address and 1000 instead of my own memory size. Is there a way to get these?
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Jan 14, 2009
I have got some code that is working as i have edited the game.exe at a certain address, now i know the code can find the address, but I don't know how to make it stop searching for it if it isn't there.
here is the:
code:
So what I want to know, is how to stop this code, if the address doesn't exist.
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Jul 4, 2010
im parsing an xml file using this code Private Function overview2(ByRef filePath As String)Dim reader As XmlTextReader = New XmlTextReader(filePath + "\movieData.xml")
[code]...
it works 80% of the time. What i mean is , i go through each node and when i find the overview node i read the data and send it to a text box. Im doing this for movies on disk. sometimes on certain movies it doesnt find the overview node even though it is there .
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May 10, 2011
As the reference values are stored in the heap as a data; where do the type information of any reference value is stored?If there are a couple of instances of class Artist; when they are stored in the heap how the .Net tags those memory blocks as type of Artist?
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May 25, 2011
I have a VB.NET user control that is saving a PDF document and then displaying that in a WebBrowser control. The code looks like this[code]...
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May 27, 2009
I'm building SQL statements with a bunch of values from a dataset. Obviously that gives some really long names to put inline or even in parameter. addwithvalue code so beforehand I just declare a bunch of variables with really short names and assign them to the DS's exact fields like: [code] but this way I'm putting all the data in the dataset into memory twice by copying it into a new variable, right? So I was thinking, if it's just a string variable representing a field on the dataset, why not declare it by reference so the variable is basically a handy nickname pointing to that field in the dataset.Will it even work to have a string declared by reference and connected to one value inside of a dataset? And if so, will that stop duplicating everything in memory? I forgot how to declare a variable as a reference to another variable instead of the normal way in VB.
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May 16, 2012
Look at this code:
CODE:
My question: When the sub ends the reference to the newReadWorker goes away since it is local to the routine but the worker still runs until it is done. Is the worker disposed of properly when it is done or should I handle the worker better. I am not getting any errors from this design. I just don't want to waste memory.
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Jan 30, 2010
where i put the *'s i get the error "The parameter 'address' cannot be an empty string. Parameter name: address".
Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
Dim mail As New MailMessage()
Dim SmtpServer As New SmtpClient
[code].....
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Mar 2, 2011
So strings are reference types right? My understanding is a reference to the string in the heap is passed even when you pass the string ByVal to a method.
String myTestValue = "NotModified";
TestMethod(myTestValue);
System.Diagnostics.Debug.Write(myTestValue); /* myTestValue = "NotModified" WTF? *[code].....
And what is going on under the hood? I would have bet my life that the value would have changed....
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Jul 19, 2010
I am trying to get the value of two IP address from a string array. I get one value at a time after I click OK button. What I need is to file two txt boxes with each value.
Code
Imports System.Management
Imports System.Net.NetworkInformation
Public Class Form1
[Code] .....
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Oct 13, 2010
In vba, There is an address held by a long type which points to a null-terminated string, but I can't find a way to get the string from this address:
long str_address = ...
string str = ?
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Dec 5, 2011
I'm attempting to use a product I've designed that stores 2 files on my web server space so I can access my stored data from anywhere. They are getting stored in the correct folder, but have several ___ (underscores) at the end of the file names.I'm sure it has to do with the way I bring back the stored string:My 2 variables are FILE1LOCATION (STRING) and FILE2LOCATION (STRING) They look just fine stored and recovered, but must not be.I recover them by the following code:
FileOpen(1, Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) & "myfoldermyprogmyinfo.dat", OpenMode.Binary)
FILE1LOCATION = " "
FileGet(1, FILELOCATION1_UPLOAD, 40)
[code]....
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Aug 20, 2010
This code should read the string "34,56,23,74,69" from a process's memory addresses (in this case notepad), right now it works but very slow and I think it even breaks somewhere. My problem is with the ReadProcessMemory function. I can't make it read an entire mbi.RegionSize into the buffer. I tried everything and now, it only reads 1 byte at a time until the mbi.RegionSize is finished then it checks if the text that was read contains the text I need to be found, then it goes to the next mbi.RegionSize. Now, even with notepad which is very small it still takes 10 seconds to find something and I intend to use it with a much bigger program, so it will take like forever. Another problem is that it only finds the string "34". If I put "34,5" it won't work.
Imports VB = Microsoft.VisualBasic
Imports System.Runtime.InteropServices
Imports System.Security.Permissions
Public Class Form1
Inherits System.Windows.Forms.Form
[Code] .....
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Aug 30, 2011
I have the follow row of sample data:
Quote:
RickiKitt10|NzMyMQOTkQ|173.234.120.242:62063:accessworld:bYRLngChRYc||RickiKi1037||
How can I extract the IP address? 173.234.120.242
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Jul 17, 2011
I have a DGV and a button to open a browser window to an ip address and also a button to open the ip address gateway. I can open the ip address that is displayed in the DGV no problem. What I am stuck on is opening the gateway address. So for example I click a record in DGV then the button and my browser opens to 10.15.2.248 What I need to do is replace 248 with 1 The ips will all end differently though for example 10.20.2.34 , 10.256.34.4 and so on. So as far as I know I will have to trim to the last period and add a 1 How can I do this?
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May 31, 2012
i am read the email address from the notepad using.[code]after that i assign the value to email.from.In debug mode, i traced and found the value assign in to mail.from is an valid email.. but ! the error still come out [code]
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Apr 8, 2012
i am trying to test if the characters in a string is a valid MAC Address
but my code
dim getMAC as string = "22:13:35:67:49:ab"
If Regex.IsMatch(getMAC, "/^([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}$") = True Then
messagebox.show("is valid")
[Code].....
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