without using object repository...we can able to run the 
scripts using descriptive programming..whenever object 
properties are changed,or objects are not recognized 
properly..and object repostiroy size will increase..that's 
the reason we write descriptive programming..just we add 
the properties in our scripting..if u want how to write 
descritptive progrmming ...then i will explaing later..

I aggree with murali answer. The thing is that without 
using object repository we have to descibe the object 
properties in the script itself. by this we can save lot of 
space and one more thing is that we can't use check points 
while doing DP since object repository is required for 
check points

Murali this is indu.i know how to wok with qtp but,the prob
is in wiriting descriptive programming.will u pla tell how 
will write the D.P.

I echo with Murali answer and one more important advantage
of DP is.. we can run the DP wherever we want without OR
setting dependencies. e.g If we have a DP for yahoo
application and we can copy and paste the DP wherever the
QTP available and yahoo application accessible then simply
run it.   

Hello Indu, find the DP program for gmail login below

browser("title:=Gmail: Email from Google - Microsoft
Internet Explorer").page("title:=Gmail: Email from
Google").WebEdit("name:=Email").Set "uname"

browser("title:=Gmail: Email from Google - Microsoft
Internet Explorer").page("title:=Gmail: Email from
Google").WebEdit("name:=Passwd").SetSecure "encrypted format
of password"

browser("title:=Gmail: Email from Google - Microsoft
Internet Explorer").page("title:=Gmail: Email from
Google").WebButton("name:=Sign in").Click