Linking variables to AutoCAD Drawing Properties

Does anyone know if EPDM can be used to link variables to AutoCAD Drawing Properties.  If so, what is the "Block Name" required for the variable attribute.  I don't see any documentation that claims it can or cannot be done.  I am able to link to the AutoCAD block attributes without any issues.  I am also able to link to SolidWorks custom properties and Microsoft Office custom properties using the "CustomProperty" block name, however, I cannot seem to link to the AutoCAD drawing properties even though "dwg" is listed in the file extensions.  Any input would be much appreciated.  Thanks for your help.