Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: ID_CA_WEIGHT_TAG_SET_BUTTON
ID_CA_WEIGHT_TAG_SET_BUTTONParameter: ID_CA_WEIGHT_TAG_RESET_BUTTON
ID_CA_WEIGHT_TAG_RESET_BUTTONParameter: Weight
ID_CA_WEIGHT_TAG_TOTALWEIGHTParameter: Speedy Gonzales
ID_CA_WEIGHT_TAG_SPEEDY_GONZALESParameter: Vertex Map
ID_CA_WEIGHT_TAG_JOINT_MAP