Add-in to show up automatically

To have a form pop up on a code behind page in IDE not
after I run the application.


I am trying to create an Add-in here to display a code header, the
functionality of Add-in is working fine. what I want is to have that
Add-in when I type something in the code behind. For example I type
Public void and press space bar I want a form to pop up, so that I can
enter some values in that, like method name, who created it, etc, and
this data can be used later in the Add-in.


Right now I have my Add-in in context menu and Tools menu but I want to

have it when I type something in Code behind not on any mouse click.


I have no idea as to how to get something to show up in code behind
page on the IDE.


Thanks