Does CSS in QTP can help identifying objects only ???

[supputuri]

You can use the DOM [Document Object Model] in either the case you are specifying your test object location (either with xpath or CSS).
Once you have defined your object then type ".Object", now you can access all the properties that are defined in the HTML.

B.P.WebButton(your xpath/CSS).Object.-----

Let me know if you need any further help...