"Catch" all messages that was sent via SendMessage method

Question

I'm using SendMessage method (WinAPI) to pass messages between 4 applications.
I want to create another application, calling LogApplication, that using like a log application, meaning that any message was sent from application to application via SendMessage insert into a log file.
I can to "catch" all the messages that send even if the 4 applications isn't send the message to LogApplication? i can catch all the messages that sent via SendMessage method?
If so, how?
Thanks.

SendMessage: https://msdn.microsoft.com/en-us/library/windows/desktop/ms644950(v=vs.85).aspx

It's what WinSpy++ does... – Adriano Repetti Apr 01 '16 at 09:00 — Adriano Repetti, Apr 01 '16 at 09:00
@AdrianoRepetti, i know... but how i can do that? – Evyatar Elmaliah Apr 01 '16 at 09:02 — Evyatar Elmaliah, Apr 01 '16 at 09:02

score 2 · Accepted Answer · edited May 23 '17 at 12:07

2

This is what Hooks are for. You install it with the use of SetWindowsHookEx, WH_GETMESSAGE should be fine for you. You will find examples in those SO:

Global hook using WH_GETMESSAGE and WH_KEYBOARD

WH_GETMESSAGE global hook not working

edited May 23 '17 at 12:07

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answered Apr 01 '16 at 09:22

marcinj

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"Catch" all messages that was sent via SendMessage method

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