how to write .ashx but in a control library?

[Lloyd Dupont]

I'm writing my own custom web library to reuse in my web project.
On of the simple control I like is a table with round corner.
The corner images are automatically generated by a .ashx (so they have the
right size, color, etc...)

Now, I have trouble putting this rounded table in my control library because
I can't create .ashx in the control library.
But I know there are things like WebHandler.axd.. isn't there (a
configuration less) way for me to have something similar (in my control
library)?