Problem with hooks capturing keyboard strikes

Hi, I'm watching another app using a keyboard hook.
Each time I strike a key, the hook reacts successfully.
But if I 'hack' very fast into the keyboard, the hook seems
to miss some strikes.
To me it seems that some strikes ain't proceed by my hook!
Can this be?!

Thankful for suggestions

Ronny

It probably is working fine, but if you are trying to debug it with message boxes and suchlike, this is the impression you get..