About the BCPropStorage object
The BCPropStorage object represents the property information that was read by theDocCADLink_AfterReadMTBProperties event or that will be written by the DocCADLink_BeforeWriteMTBProperties event.
The BCPropStorage object represents the property information that was read by theDocCADLink_AfterReadMTBProperties event or that will be written by the DocCADLink_BeforeWriteMTBProperties event.