Many thanks! I will look into the options you gave me.. What I need is 1) Detects a user close the options form (like windows messenger) 2) Capture and save the values he entered.. I am not making a global spy util (maybe it is), but I want to monitor an application like Crystal Reports what actions the user did and what data he saw... Maybe there are some other options? Thanks!

Hi, Thanks for your reply.. I already looked into this article, but I need a way to monitor 3rd party applications where I don't have any source from.. I am looking for a couple days now and I don't get a clear picture where to start. I know it's not simple, but I need to know what technique is useful for me.. Thanks in advance!

Hello all, I am searching on the net for 2 days and I am reading a lot about Hooking and Injecting your own dll's into another process, but I don't get clear what technique is usefull for me. Let me explain what I want to accomplish. I want to monitor a 3rd party application what actions a user takes, like he opened an options window and on the close button click I want to get the values he entered. Or he opened a process that takes a while (like processing a document). I looked into some things, but can get a clear view on this.. Can someone helps me out? Many thanks in advance, Derck (P.S. I don't find many vb.net samples on hooking or subclassing :()