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[C# and C++]Reading a pointer
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yoyonerd
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Posted: Fri May 29, 2009 10:35 pm Post subject: [C# and C++]Reading a pointer

Code:

__inline ULONG_PTR ReadPointer(ULONG_PTR* ulBase, INT nOffset)
{
   if ( !IsBadReadPtr((VOID*)ulBase, sizeof(ULONG_PTR)) )
      if ( !IsBadReadPtr((VOID*)((*(ULONG_PTR*)ulBase)+nOffset), sizeof(ULONG_PTR)) )
         return *(ULONG_PTR*)((*(ULONG_PTR*)ulBase)+nOffset);
   return 0;
}

That is a code I found for reading a pointer in C++

However I can't get it to work (converting it) for C#.

I do know what I am doing, but I THINK that C#'s limitations with pointers is what's stopping me.

Code:

/*Pointer: 33605FD8
Offset: 65c*/

There's the pointer and offset, if you could please show me how to display it in C#.

This is what I've come up with:

Code:

ulong* ptr = (ulong*)((ulong)0x33605FD8 + (ulong)0x65C);

Console.WriteLine((int)ptr);

Heh, I'm still trying to learn these types of things, with pointers and such.

I'm still learning about C++, so I'm doing everything in C#

I tried this in VS 2008 and it gives me errors:

Code:

#include <Windows.h>
#include <iostream>
#include <string>

int main()
{
std::cout << Ptr::ReadPointer(0x33605FD8, 0x65C);

return 0;
}

class Ptr
{
public:
__inline ULONG_PTR ReadPointer(ULONG_PTR* ulBase, INT nOffset)
{
   if ( !IsBadReadPtr((VOID*)ulBase, sizeof(ULONG_PTR)) )
      if ( !IsBadReadPtr((VOID*)((*(ULONG_PTR*)ulBase)+nOffset), sizeof(ULONG_PTR)) )
         return *(ULONG_PTR*)((*(ULONG_PTR*)ulBase)+nOffset);
   return 0;
}
protected:
private:
};

Gives me errors:

Code:

Error 1 error C2653: 'Ptr' : is not a class or namespace name c:\Users\Aaron\Documents\Visual Studio 2008\Projects\PixelColor\PixelColor\main.cpp 27 PixelColor
Error 2 error C3861: 'ReadPointer': identifier not found c:\Users\Aaron\Documents\Visual Studio 2008\Projects\PixelColor\PixelColor\main.cpp 27 PixelColor

And I DO know what they are talking about, but whatever I do, the errors remain.

The solution name is a long story btw.

Thank you =D
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Last edited by yoyonerd on Fri May 29, 2009 10:54 pm; edited 1 time in total

hcavolsdsadgadsg
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Posted: Fri May 29, 2009 10:48 pm Post subject:

move your class definition to above your main function

yoyonerd
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Posted: Fri May 29, 2009 10:56 pm Post subject:

now it compiles but it always returns 0 _________________ My Series of C# Video Tutorials My Personal Section For Teaching the C# language

dnsi0
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Posted: Sat May 30, 2009 7:07 am Post subject:

yoyonerd wrote:

now it compiles but it always returns 0

um. Try reading the pointer with cheatengine. If that fails then you know that your pointer is incorrect. If it does work, then there is a problem with your code.

talkerzero
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Joined: 24 Jul 2008
Posts: 560
Location: California

Posted: Sat May 30, 2009 10:48 am Post subject:

Code:

__inline ULONG_PTR ReadPointer(ULONG_PTR* ulBase, INT nOffset)
{
if ( !IsBadReadPtr((VOID*)ulBase, sizeof(ULONG_PTR)) )
{
   if ( !IsBadReadPtr((VOID*)((*(ULONG_PTR*)ulBase)+nOffset), sizeof(ULONG_PTR)) )
      return *(ULONG_PTR*)((*(ULONG_PTR*)ulBase)+nOffset);
   return -1;
}
return 0;
}

Use that to figure out where the function's failing.

tombana
Master Cheater

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Posts: 456
Location: The Netherlands

Posted: Sat May 30, 2009 12:15 pm Post subject:

Maybe the value stored at that address + offset is zero.

yoyonerd
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Posted: Sat May 30, 2009 12:28 pm Post subject:

@dnsi0 I know the pointer + offset is correct, I've asked several people for them, and always get the same response. @tombana Naw, it is supposed to return the Map ID of the map my character is in. EDIT: @colour0xFFA500 Still returns 0 _________________ My Series of C# Video Tutorials My Personal Section For Teaching the C# language

dnsi0
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Posted: Sat May 30, 2009 12:39 pm Post subject:

yoyonerd wrote:

@dnsi0

I know the pointer + offset is correct, I've asked several people for them, and always get the same response.

@tombana

Naw, it is supposed to return the Map ID of the map my character is in.

EDIT:
@colour0xFFA500

Still returns 0

Haha for ms? Just do:
HAHA=*(DWORD*)((*(DWORD*)MapBase)+Offset)

And use the try and except blocks to look for errors.

yoyonerd
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Posted: Sat May 30, 2009 1:20 pm Post subject:

dnsi0 wrote:

yoyonerd wrote:

Haha for ms? Just do:
HAHA=*(DWORD*)((*(DWORD*)MapBase)+Offset)

And use the try and except blocks to look for errors.

Yep >:]

I tried something different

I replaced return 0 with the return of the Pointer's value, so it would be forced to return the pointer, but it gives me an access violation error.
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dnsi0
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Posted: Sat May 30, 2009 1:32 pm Post subject:

yoyonerd wrote:

dnsi0 wrote:

yoyonerd wrote:

Haha for ms? Just do:
HAHA=*(DWORD*)((*(DWORD*)MapBase)+Offset)

And use the try and except blocks to look for errors.

Yep >:]

I tried something different

I replaced return 0 with the return of the Pointer's value, so it would be forced to return the pointer, but it gives me an access violation error.

That just means that its an invalid address/offset. Is this a dll? And did you inject it to the right process?

yoyonerd
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Posted: Sat May 30, 2009 2:45 pm Post subject:

dnsi0 wrote:

yoyonerd wrote:

dnsi0 wrote:

yoyonerd wrote:

Haha for ms? Just do:
HAHA=*(DWORD*)((*(DWORD*)MapBase)+Offset)

And use the try and except blocks to look for errors.

Yep >:]

I tried something different

I replaced return 0 with the return of the Pointer's value, so it would be forced to return the pointer, but it gives me an access violation error.

That just means that its an invalid address/offset. Is this a dll? And did you inject it to the right process?

Lol, epic fail~

I forgot you need to use an injected dll to directly read memory.

It was actually just a win32 console app >.>
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HomerSexual
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Posted: Sat May 30, 2009 5:16 pm Post subject:

dnsi0 wrote:

yoyonerd wrote:

Haha for ms? Just do:
HAHA=*(DWORD*)((*(DWORD*)MapBase)+Offset)

And use the try and except blocks to look for errors.

Thats risky. The readpointer method is to test for invalid memory and not fail the program. If mapbase or mapbase+offset points to nothing the program will fail. Rolling Eyes

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dnsi0
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Posted: Sat May 30, 2009 7:45 pm Post subject:

blankrider wrote:

dnsi0 wrote:

yoyonerd wrote:

Haha for ms? Just do:
HAHA=*(DWORD*)((*(DWORD*)MapBase)+Offset)

And use the try and except blocks to look for errors.

Thats risky. The readpointer method is to test for invalid memory and not fail the program. If mapbase or mapbase+offset points to nothing the program will fail. Rolling Eyes

But wouldn't a try/catch block be able to catch the ACCESSVIOLATION exception?

yoyonerd
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Posted: Sat May 30, 2009 9:46 pm Post subject:

Does anyone know how to make a Win32 Console Application injectable?

It's already a DLL, but when I inject it, nothing appears.

I got these codes from an old trainer, but it looks like it is made for a resource form, not a Win32 Console App

Code:

//Show Dialogue
DWORD WINAPI MainWin( HMODULE hModule){
Sleep(500);
DialogBox(hModule, MAKEINTRESOURCE(IDD_DIALOG1), NULL, (DLGPROC)DlgProc);
ExitThread(0);
return 0;
}

//Entry Point into program.
BOOL APIENTRY DllMain( HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
            )
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
      DisableThreadLibraryCalls(hModule);
      CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)MainWin, hModule, 0, NULL);
      break;
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
      FinishedExit = TRUE;
      break;
}
return TRUE;
}

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dnsi0
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Posted: Sun May 31, 2009 7:33 am Post subject:

yoyonerd wrote:

Code:

You need a dlgproc to handle all the messages the dialog is gonna throw at you. Just rip it out of kitterz trainer.

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