Yes,By using descriptive Programming.by defining each 
object properties...
But it is not suggested all the times.Instead we have the 
facility like object Repo.also QT identfies the objects 
using recorded Description & smart identification.

Thanks Mr.Lokesh

Mr.lokesh can you please send few example of Descriptive 
programm details of qtp without object Repositry...!

Hi Srinivasan!
Identification can be done using descriptive programming.
Here is example # 1 with description object.
set EditDesc = Description.Create()
EditDesc("Name").Value = "userName"
EditDesc("Index").Value = "0"
Browser("Welcome: Mercury").Page("Welcome: Mercury").WebEdit
(EditDesc).Set "MyName" 
Here is example # 2 with out description object.
Dialog("text:=Login").WinEdit("window id:=3001","attached 
text:=Agent.*").Set "john"
Dialog("text:=Login").WinEdit("window id:=2000","attached 
text:=Password:").Set "mercury"
Dialog("text:=Login").WinButton("text:=OK").Click
These both method will be used in expert view to identify 
object with out object avaialble in object repository.

Yes, you can run QTP script with object repository by using 
descriptive programming. But it is advisable when your 
object logical name or properties change frequently, 
otherwise not.

hi guys i think u people have not correctly understood
descriptive programming concept. please note descriptive
programming is written without any any object in object
repository. It is normally written even before the
application is ready. that is why descriptive programming is
the best.

I won't prefer Keyword Approch, please check below points.

?The Keyword driven approach was difficult to understand 
for any new person who is introduced to QTP.
?The approach did not utilize QTP resources effectively, 
like we were not referring to the actual names of the 
object in the script but in the datatable. This meant if we 
changed an object name in the repository we had to change 
it in the datatable as well, which otherwise is not 
required.

Descriptive programming is an advanced concept in QTP.We can
handle the application without using object repository.It 
can be implimented by using object syp when the application 
is available.And It can also be implemented with out 
application in hand based on the properties of the object( 
which can be done by experts).The main purpose of using DP 
is it increases the performance of the tool.Easy to 
maintain.Very flexible in objectsvimplementing and we can 
modify the script easily when compare to QTP script/code.