docs on stretch-to constraint?

Support Basics & Interface
1

i am not finding much in the way of documentation for the stretch-to constraint. anyone know where some is? i have no clue how to use this.

2

Some information here:

http://www.blender3d.com/cms/Stretch_To_Constraint.483.0.html

3

thanks, i downloaded the .blend they provided. hopefully i can figure it out from that.