Get bounding box for multibody part?

Hi,

Not long ago I tweaked a macro to get the bounding box of an assembly using the 'GetBox' Method.

2015 SOLIDWORKS API Help - GetBox Method (IComponent2)

Does anyone know what the equivalent function is for a part containing multibodies? I know how to get bounding box dimensions for individual bodies from the cutlist, but not the OVERALL dimensions of the part.

Any ideas?

SolidworksApi macros