read a URL text from textbox and open particular URL in a browser

i am new to qtp ...

Can anyone give me a clue how to proceed on the below requirement...

when i try to run QTP...
it should prompt me a textbox(eg:- enter the URL you would like to open).
based on the text(eg:- URL name) which we enter into a text box... that particular website should open...

waiting for the replies...
please let me know if my question is not clear enough...

Thanks in advance
Navya