How can I build my own Parameter Info Tooltip?

Hi,

I came across these articles:

http://msdn.microsoft.com/en-us/library/bb166756.aspx

http://msdn.microsoft.com/en-us/library/bb166199.aspx

But what I would like to do is to implement my own tooltip (in other words, draw it myself). Is that possible? Is there a tutorial to start me in the right direction?

Thanks!