DispPlane? reference geometry

I am trying to dump the strain data for and entity using: RetVal = CWResults.GetStrain ( NElementNumber, NStepNum, DispPlane, ErrorCode)

Where DispPlane is a "Dispatch pointer to reference geometry"

The global x-y-z coordinates are fine. What is the easiest way to supply the pointer?

Thanks!

Jim

SolidworksApi macros