Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Use Transfer
POINTSELECTIONTAG_ENABLEFIELDSParameter: Transfer Mode
POINTSELECTIONTAG_TRANSFER_MODEParameter: Update
POINTSELECTIONTAG_UPDATEParameter: Select
POINTSELECTIONTAG_COMMAND1Parameter: Deselect
POINTSELECTIONTAG_COMMAND4Parameter: Hide
POINTSELECTIONTAG_COMMAND5Parameter: Show
POINTSELECTIONTAG_COMMAND6Parameter: Solo
POINTSELECTIONTAG_COMMAND2Parameter: Show All
POINTSELECTIONTAG_UNHIDEALLParameter: Tolerance
POINTSELECTIONTAG_FIELDTOLERANCEParameter: Use Deformed Points
POINTSELECTIONTAG_DEFORMEDSTATEParameter: Fields
POINTSELECTIONTAG_FIELDS