Avoiding an Error Message

I've put something in the BeforeInsert event of my TTable to dis-allow a
user to manually insert a record in a browse.  Here is the code:

   if ActiveControl = DBGrid1 then

What is happening is when it hits the "Abort" command Delphi says something
like "Operation Aborted". Yea...that's what I told you to do, but I don't
want to be told about it (Duuuhhh).  How do I avoid this message?

I'm using Delphi 1.