access right to keyboard

Why should an app ask to access the keyboard?I never noticed that before.It happens to me with MyLockbox V2.0.1.Checked in Def+ settings,access rights,set is on “ask”,same to many others apps:this means that CIS is working properly,but I can’t understand the reason of this request.Only COMODO and a couple of other programmes are allowed to access the keyboard and I never seen this request by another app.I’m using MyLockbox since one year without any problem,and don’t like to give it up,if it’s not necessary for security;CIS’ version is the latest,4.1…916,OS is WinXPProSP3.By chance,can somebody give me some info about?Thanks a lot in advance.