How to get spline length assigned to equation variable or custom property

SF 2007-01-19

I have a sweep that follows a 3D Spline. How can I assign thevalue returned for the length of the spline path displayed usingthe TOOLS>MEASURE to an equation variable? I want to be able toget the length of the 3D spline path and display this value in acustom properties cell to use in a drawing.Solidworks Parts And Features