Integration of office 365 with Asp.net web application

Hi,<o:p></o:p>

I have an asp.net web application which has a calender. I want that if the user select any date from the calender, it should be reflected\shown in office 365 portal. How to do this.<o:p></o:p>

An early reply will be appreciated.<o:p></o:p>

Thanks<o:p></o:p>

Abhinav<o:p></o:p>