How do I detect calls made to the USER32.dll by other applications but my own

If I wanted to detect calls made to the User32.dll by another application, how would I do this?

Lets say I am waiting for a specific call to the dll but do not know from where it would come.
If this API call is directed at this dll I want to be able to listen for calls like the CallNextHookEx or the FindWindow call.

If this call is made I want to be able to catch it before the dll reacts to it. If I catch it I want to be able to kill this call and not allow it to go through.

I know that I have to create a hook but I there is anyone out there that can use an example of how this is to be done I would be ever so happy!!

Thank you.
Horatio
HoratioHAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

GloomyFriarCommented:
Here is one link for you.
http://www.codeproject.com/system/hooksys.asp

I've developed similar programm. But the programm hooks API from kernel.dll and only for one application.
But i think it can be registered as global hook.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
MadshiCommented:
Hi Horatio,

you might want to check this one out:

http://help.madshi.net/madCodeHook.htm

This package is free for non-commercial purpose (only). It can do system wide API hooking on all win32 OSs. Several demos are also included. The demos are available for download here:

http://madshi.net/MCHDemos.zip
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Delphi

From novice to tech pro — start learning today.