Cheat Engine

[renzo.psi]

I've done the cheatengine tutorial but and read some AA tutorials, but I can't figure this out.

What i'm trying to do is do add values to this "mov [ecx+20],eax", but this comes too in the script used on cheat engine tutorial "mov eax,00000004"

So, it`s possible to simply put "add [ecx+20],eax],2000"? (if i want to add 2000 to the address that decrease my money by 1000)
I know that the code mov is to move that address to eax, or something like that, well that is the thing i cant figure out, do I need to follow the addresses and find where is being storaged?

This is the script I get and don`t know how to change:

[Slugsnack]

you can try and replace 'mov [ecx+20], eax' with 'mov [ecx+20], #2000'. usually a cleaner approach is to modify the value of eax before this mov instruction, but in your case, eax's contents are destroyed anyway

i'm not 100% sure what you're trying to do. if you're trying to increase [ecx+20] by 2000, you could also just do this :
add [ecx+20], #2000

the reason that 'mov eax, 4' was seemingly randomly dragged in there is because the jmp that was written to redirect code at 136BC44B: to newmem: has overwritten more than 1 instruction because of the size of the jmp. the overwritten instruction must therefore be executed in the redirect version of the code so that is what it is doing there.

[renzo.psi]

Well, there is a button on a game ("buy") that makes me spend 1000 coins (duh!) so what im trying to do is to make this button increase my coins by 1000, since I saw this on step 7 of the tutorial I thought it would work. Thanks for your advice :O

Edit: Well i've tried but doesn't work, everyting goes ok but there is no change in the game

[educofu]

the game changed EAX (which seems to the money you get) to -1000. then moved the value of EAX to [ecx+20] which is the address of your money.
So if u do like this:

mov eax,1000

before it changes your money, it should work.

[Freiza]