How to detect when a game calls a certain function, such as Save or Load.

[atom0s]

Trace back a few steps where the call to CreateFile was made now and see if the file name being passed is the name of the save game file. If it is then you have found part of the saving/loading routine.

[K^2]

Trace back a few steps where the call to CreateFile was made now and see if the file name being passed is the name of the save game file. If it is then you have found part of the saving/loading routine.

Think I might have cracked it.

I opened a new project along with gta_sa.exe.
Selected the strings window and searched for "CreateFileA" then double clicked everyone I found until I got this (I highlighted it):

https://i.imgur.com/Y0cT7xT.pn

So I double clicked "sub_156BBFB+19E"

And then I got this (I highlighted it):

https://i.imgur.com/OUH5wwV.png

I put a breakpoint on this and proceeded to load a game.
Came out of the game and IDA had caught the Load.

So does this mean the address: 0156BD99 is the one I've been looking for?