Developing Microsoft Outlook Add in From VSTO 2008

Question

Hi team,

I am going to develop outlook add in as my final year project. for that as a initial stage i need to develop a button in Outlook page after clicking that button system gets user's particular E-mail address (after clicking button the another window is open ans ask for mail address)  and read unread E-mails from .pst file.   pls help me to start my project by

- developing particular button on Outlook,

- then opening a particular window after clicking that button and

- reading unread e-mail messages from .pst file. 

Thank you