Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Use Transfer
EDGESELECTIONTAG_ENABLEFIELDSParameter: Transfer Mode
EDGESELECTIONTAG_TRANSFER_MODEParameter: Update
EDGESELECTIONTAG_UPDATEParameter: Select
EDGESELECTIONTAG_COMMAND1Parameter: Deselect
EDGESELECTIONTAG_COMMAND4Parameter: Hide
EDGESELECTIONTAG_COMMAND5Parameter: Show
EDGESELECTIONTAG_COMMAND6Parameter: Solo
EDGESELECTIONTAG_COMMAND2Parameter: Show All
EDGESELECTIONTAG_UNHIDEALLParameter: Tolerance
EDGESELECTIONTAG_FIELDTOLERANCEParameter: Use Deformed Points
EDGESELECTIONTAG_DEFORMEDSTATEParameter: Fields
EDGESELECTIONTAG_FIELDS