Extracting "Secure" data from Web

I have several bank and credit card accounts. These pages are of course encrypted. I would like to be able to log on to a page, extract the current balance, or even a number of transactions.

This would require the ability to log on, enter a password, then navigate pages, and ultimately download the contents of the screen to be parsed or something more elegant if possible.

I would like to do this transparently, basically click on a "fetch" button and have it log on to several accounts do its thing and display the results on a form of my own design. :confused:

How is security handled on the website? Most web handling objects (i.e. WebClient) in .NET will take a Credentials object to pass along for authentication. I'm not sure if these only work with Windows Authentication on the website or what.