Change the default behavior of Internet Explorer using C#

Question

I want to make a small web application. The details are given below.

Three tabs will be opened in an Internet Explorer. Each tab will go to our client's website i.e. www.xyz.com

The client's website has a database of addresses. The www.xyz.com has an address checking tool. I will enter 3 different addresses at a time in 3 different tabs of the address checking tool. However, the default behavior of Internet explorer checks result for any one address from the 3 different addresses entered.

How can I modify the default behavior of Internet explorer (Please note that I want to modify the default behavior of Internet Explorer only in the application, not in the actual IE), so that it returns 3 different addresses?