Cheat Engine

[noobidydoobedy]

There are many posts with this topic, but I didn't really understand much of the responses, and I think my question is a little bit different.

I made a small C++ program so I can show you in a more simple way what I'm trying to do with a game:

[code]#include <iostream>
#include <windows.h>

using namespace std;

int val;

void func() {
val++;
cout << val << "\n";
}

int main()
{
func();
while(1) {
if(GetKeyState('A') & 0x8000)
{
func();
Sleep(3000);
}
}
return 0;
} [/code]


Basically it's just a console application, and if we press the 'A' key then that variable will be incremented by one and displayed on the screen.

Now, I found the call to the function in memory, it's:
[code]app.exe+3C14: call app.exe+1470[/code]
So, when the 'A' key is pressed, this instruction happens. If I NOP it, then pressing 'A' won't do anything.

Now my question is: can I call this instruction FROM Cheat Engine, whenever I want to?

There are different post that use AOB Injection / Code Injection / etc., but I tried to use them and what I can do only is modify the behaviour of that function, for example I can add a different value to the variable than 1 when 'A' is pressed.

What I want to do though, is have the program as it is, and just call that function which increments the value and prints it whenever I want to, with a Cheat Engine script.

In the actual game I am trying to do this because some features are hidden in some contexts, and I want to press a button in Cheat Engine to call the game function which makes them displayed.

If I try to make this small example work, I would probably understand how to do it with the actual game.

I am pretty new to this, so maybe my question is dumb, or maybe this is not even possible, I don't know. Any help will be appreciated!

Edit: sorry, I can't make the code format work

[Dark Byte]

lua: executeCodeEx(1,nil,"app.exe+1470")

docs:

[noobidydoobedy]

[quote="Dark Byte"]lua: executeCodeEx(1,nil,"app.exe+1470")

docs:
[code]
executeCodeEx(callmethod, timeout, address,{type=x,value=param1} or param1,{type=x,value=param2} or param2,...)
callmethod: 0=stdcall, 1=cdecl
timeout: Number of milliseconds to wait for a result. nil or -1, infitely. 0 is no wait (will not free the call memory, so beware of it's memory leak)
address: Address to execute
{type,value} : Table containing the value type, and the value
{
type: 0=integer (32/64bit) can also be a pointer
1=float (32-bit float)
2=double (64-bit float)
3=ascii string (will get converted to a pointer to that string)
4=wide string (will get converted to a pointer to that string)

value: anything base type that lua can interpret
}
if just param is provided CE will guess the type based on the provided type

executeMethod(callmethod, timeout, address, {regnr=0..15,classinstance=xxxxxxxx} or classinstance, {type=x,value=param1} or param1, {type=x,value=param2} or param2,...) - Executes a method.
regnr can be:
0: R/EAX
1: R/ECX
2: R/EDX
3: R/EBX
4: R/ESP
5: R/EBP
6: R/ESI
7: R/EDI
8: R8
9: R9
10: R10
11: R11
12: R12
13: R13
14: R14
15: R15


If no register number is provided then ECX(1) is picked
If instance is nil it is the same as executeCodeEx

[/code][/quote]

Thank you very much, this was what I was looking for.