Needing VB to read from a txt file or any other file and do a specific action

So I am building a blocker program for my own family's personal use.

So lets say I have a txt file listing these websites: http://ift.tt/1Bv16TA www.fake.net

I want it to find the txt file that has that information, then pull it and use it and since my program is a web browser I want it to block those websites I defined.

I ONLY WANT IT TO BLOCK THE WEBSITE IN MY APPLICATION NOT OVER THE WHOLE COMPUTER (meaning I don't want it to be blocked in Chrome, Firefox, Internet Explorer, Safari, ECT.)