Need Stingray addin for .net application

[QTpier]

Hi All

I need to have stingray addin in my QTP for testing one of the .net based application.From where can I get the stingray addin to use?
Do I need to purchase it from HP?

[vinod123]

Instead of using old QTP 10 or lower use UFT 11.50 and higher for testing the applications because it supports all major environments