[Pharo-users] Want to connect two morphs with a line.

Hi All, I want to connect two morphs with a line for a UML editor application I'm working on. I want to show the line being created as the user moves the mouse from the source morph to the target morph. Once the mouse is over the target morph and the mouse released, the line should be created. Can someone explain how I would go about doing this. Which events would I need to capture, etc. Thanks.