Obtain data from external application

[DuK3]

Hello!
I am a new member here but this is not my first encounter with evilzone, I have been a member of this forum at various times in it's previous incarnations. 
 I've got an issue I would really appreciate any help I can get with it.
 I am trying for the first time to create an application in VB.net that will take data
 from a third application without the user seeing the process and then display the data from the 3rd application on my own application's GUI for the user to see.
 More specifically, I am trying to develop an application that shows a user's own local passwords stored in his or her browser cache. This has no commercial value, it's just for fun and would help me understand how to interact with 3rd party applications. I have found on the Internet a piece of software developed by Nirsoft that does exactly that and can be found at http://www.nirsoft.net/utils/pspv.html , it's called Protected Storage PassView and it has command line options so I know the results it displays can somehow be linked to my VB.net application.
 I kindly request some guidance on how I can go about linking the two.
 Thanks in advance!

[ande]

If you have a look at how the Nirsoft app works, you will see that you can make it output the results to a text, html and many other formats. So all you would have to do is run the application with the desired arguments. Example wise nirsoft-exe.exe /stext c:\hurr\durr\passwords.txt. Then make your application read that file afterwards and parse it if needed.

[Kulverstukas]

If you want at least a bit of professional look in your program, I suggest you take a look how those passwords are stored.
Opera stores passwords in some file, I am not sure, maybe it uses a database now.
Firefox (ant other Mozzila software) forever used and will probably continue to use SQLite database for password storage and other stuff. So you need to interact with the SQLite to get those passwords.
That is of course assuming that no master password is set - browsers usually have that option, but many users don't know about it