1. Pass its error message up the call stack as the exception's message. 2. In case of REGDB_E_CLASSNOTREG, also obtain the object's class name and append it to the message. 3. Show this information in the message displayed for OLE activation error. This introduces a new SetExtendedMessage method in SfxErrorContext to store extra information for specific errors. Change-Id: Id3863276266d992ae407fbfa5568acf5c57aa96f Reviewed-on: https://gerrit.libreoffice.org/c/core/+/157372 Tested-by: Jenkins Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>