LHook: Local Api Hooker coded in MASM!
 

LHook:
Local Api Hooker coded in MASM!

LHook.asm start contains all examples you will need on the wild:

start:
invoke Hook, ADDR UserModuleName, ADDR MsgBoxApiName, ADDR MessageBoxTypeChange
; hook MessageBoxA api, ADDR MessageBoxTypeChange is the address called

invoke UnHook, ADDR UserModuleName, ADDR MsgBoxApiName
; unhook MessageBoxA api

Version 3 out
 

In version 2:
- Now you can hook an Api multiple times;
- Fixed jump/call instructions

Version 3 out:
- Now converts long jumps back to short jumps when possible
I opted for instructions fix-ups not backups.
Hopefully this is the final version if everything works like it should.

external link
 

possible we have this in a external link
thank you

Alternatively you can get the source code from:
https://gitlab.com/CodeCracker/lhook
https://github.com/CodeCrackerSND/LHook
https://bitbucket.org/CodeCrackerSND/lhook/src