Where does EventCalendar come from?

[Cal Who]

In the ClubWeb starter kit there is an EventCalendar in the bin directory.

I am using that in my web site but there is no vertical line between Tue and
Wed.

I wonder if you know where that dll came from.

Is the code available or maybe an newer version than what I have.

For what it's worth it is used as following:
<%@ Register TagPrefix="ec" Namespace="ControlSample"
Assembly="EventCalendar" %>

....

<ec:EventCalendar runat="server" ...



Thanks for any info