Memory address from pointer

Question

Yesterday i started messing with c# and VAMemory.ddl. My goal is to make a Program that will Read the player's HP from a game "League of Legends". I found out the static address of the HP and read it:

vam.ReadFloat((IntPtr)address);

It worked pretty well, and i could see my in-game HP from my program, but since it is a static address and it changes every time i restart the game, i have to find the address every time. So i started to look for pointers. I followed a couple of tutorials and after about a Hour i could see my HP in cheatengine, restart the game and without chaneging the address still see it.

But i don't understand how would i implement it to my program, i couldn't find any tutorials. :/

Here is what i found from Cheatengine:

Current HP - League of Legends.exe - 0x032871FC - 0x58, 0x6C0, 0x42C, 0x90, 0x448 - float

Answer 1

Here is a possible approach to solve your problem. Note that the software need to be a 32 bit software!

Step one is to get the base address of the process:

Process GameProcess = Process.GetProcessesByName("GameProcessName").FirstOrDefault();
IntPtr BaseAddress = GameProcess.MainModule.BaseAddress;

Based on this address you are able to step through the pointers like (exemplary offset of 0x58)

int ReadBytes;
IntPtr BasePlusOneAddress = IntPtr.Add(BaseAddress, 0x58);
IntPtr BasePlusOneValue = (IntPtr)BitConverter.ToInt32(MemoryHandler.ReadMemory(GameProcess, BasePlusOneAddress, 4, out ReadBytes), 0);

You can use the value now as pointer again.

This leads to a simple function like

void IntPtr GetOffsetPointer(Process P, IntPtr BasePointer, Int32 Offset)
{
    int ReadBytes;
    IntPtr OffsetAddress = IntPtr.Add(BasePointer, Offset);
    return (IntPtr)BitConverter.ToInt32(MemoryHandler.ReadMemory(P, OffsetAddress, 4, out ReadBytes), 0);
}

EDIT: The MemoryHandler just wraps the ReadProcessMemory function of windows. This is just an example - so you have to implement your own functionality. A greate example is available at Code Project.