Application to grab a website contain and save it to a text file

I want you to build me a application to grab a website contain. Only grab part of the page with some criterias and save it the a text file with particular format (text {TAB} text). If this application run without parameter then it should display a input box for a user to input a date. If it run with a parameter (date) then it will grab the website content automatically without having a user to input a date. I think this is not too hard to program if you’re expert with particular programming language and website scraping. This application should run perfectly on Windows XP, Vista and Windows 7. Any programming language is acceptable as long as it can be compiled into exe file. Contact me for detail. Thanks