Equations using Custom Material Properties (defined by user)

I am not an expert in the least with API related issues, so any/all help is much appreciated!  An answer to this question could help our company with 10,000 plus drawings & parts.

The Problem for SLDPRT:

Solidworks has the Equation Editor, materials, custom materials, and within custom materials, custom material properties may be defined.  I want to use the Custom Material Properties shown here:

We need to be able to use this highlighted "value" in the equation editor, for example.

I would assume there is some type of sneaky code or a text string that could be used in the equation editor.

Fire away!

Thanks,

Bryan

SolidworksApi macros