CountyIT 0 Posted October 20, 2012 Very nice UDF. I have been staring at it and it is way beyond me. I was wondering if anyone could answer a couple of questions about it. 1) If you don't specify a WindowHandle and jsut do a _BlockInputEx(1) does it essentially just go through all open Windows and block each open Window by handle? 2) Since Window handles change you might need to BlockInput several, several times in a program. Say I always want to block input in notepad. The user can open and close hundreds of notepad items in an eight hour day. Will I eventually wind up in trouble by calling _BlockInputEx(1,"","",hNotepadWin) so many times? i.e. do you need to somehow release BlockInput or sooner or later you will have stack or memory problems? Share this post Link to post Share on other sites