VB Forum / Win API / August 2007

Has anyone used this dll?  It is a C dll written by J. Thuemmler and
distributed by allapi.net.  It allows me to monitor messages and
catch
messages from another application.

I am using it to monitor for button clicks in another app.  Further
if
the other app should get closed I monitor for it to get reopened then
I try to reset the hook and continue monitoring the buttons.  This is
where I am having problems.  The dll works flawlessly the first time
I
set the hook.  However if the app is closed then reopened I am unable
to establish a new hook.

The author says in his documentation for the dll that:
"NOTE:
You can call the function for setting a hook only one time. A second
call after you have
installed a hook already will return 0 (Zero). If you want to install
both of the hooks, you
must do it in one single call."

But it seams as though clearing the hook (by setting the hook win
handle to 0) should reset this and allow it to be set again.

Can anybody tell me if this is a true statement and what I might be
doing wrong.

Thanks,
Steve