Cheat Engine

[Ganoes Paran]

I may not have a large post count but i've been looking round this forum for a long time. (mad ea new account, been around here for about 3 years or so)

anyways so I've been trying to create trainer using C++. i'm not a beginer at C++ nor am I an expert, but i'm alright at it

so i've been using the serach feature trying to find out a thread which can help me on this regard but nothing showed up at all to help me out/

so anyways decided to make my own thread with my problem and ehre it is


bassicly, I know how to make a basic C++ program, and I can make a hack work easily (for example changing the value of an address or something, like making a unit limit -1 to spawn unlimited amount of units or w.e.

The problem i'm having is incorporating opcodes in a way to modify them. for esample like making an auto asembly script but in C++, I can't do it for w.e. reason

I've read something of using a command like this: *(WORD*)0x0165474A = 0x8890; or what not, but when i try to activate it whe i'm in the game I have an error which is this error: "Unhandled exception at 0x010b1187 in asdf.exe: 0xC0000005: Access violation writing location 0x0165474a."

basicly Access violation to write something or w.e.

for writing a value to something (like the -1 example shown above) i do soemthing like:

stamina = -1;
WriteProcessMemory(hProcess, stamina_addr, &stamina, 4, NULL);

and itworks no problem, but again no idea how to write opcodes correctly. any advice/help/example code would be much appreciated, thanks =)

[Slugsnack]

take a look at VirtualProtectEx(). opcodes are generally in memory that has write protections. you need to remove this protection then restore it for when you're done

[Ganoes Paran]

ok i looked a bit with VisualProtectEx() but I think I don't knwo exactly how to use it. any advice on n example would be helpful

[&Vage]

You're only editing BYTE so you'll only need 1... Also its better to use VirtualProtect rather than VirtualProtectEx when using direct memory access.

[smartz993]

[&Vage]

[HomerSexual]

[Ganoes Paran]

well i'm not posting my whole code (rather not because it's in a sort of mess atm) but like i said, I have no problem at all editing values of addresses in the program, just chaging opcodes because of the write code error or w.e.

I already have the current handle, process and w.e. everything allright It's just not allowing me to edit opcodes =\

tried both the "change to 1" and the handle -1 stuff and stil same error. further help would be appreciated =3

[hcavolsdsadgadsg]

GetLastError()

use it and love it.

[smartz993]

Try WriteProcessMemory like this, and don't worry about write protection:

[Ganoes Paran]

Well when i'm runing the program, and i cativate that memory edit itll just break on that command and it'll not continue onwards from there so i don't hink getlasterror command will work that well =\

and the error is, I assume, that VirtualProtectEx isn't realyl workign right because i'm doing something wrong =\

Edit: trying the method sugested just above

Edit: sweet it works, thanks alot! =)

Now nother question: how to make a nice workable codecave w/c++?

[hcavolsdsadgadsg]

find a nice spot, write the jump to it, do whatever, jump back.

you're just writing the opcodes.

[Ganoes Paran]

oh yea, duh, thanks

[Rur3k]

Or you could simply use WriteMemoryProcess function as stated by smartz993, I have actually just finished a program which does exactly what you are asking for.

If anyone would like this, or would like to learn from my source, please feel free to contact me via PM.

[igoticecream]