serach text in pdf

Hi All

I have developed a program to serach text in a pdf. It is working fine,

set findtxt to text returned of (display dialog "Please enter the text hich you want to search" default answer "Author")
set findtxt to findtxt as string
tell application "Acrobat 6.0 Professional"
	tell front document
		find text string findtxt
	end tell
end tell

Now I want to make a new commenting box or annotation box where the searched item found.

Thanks & Regards

No body is able to solve my problem.