Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Type
SLA_DISTORTER_TYPE
Parameter: Wrap
SLA_DISTORTER_WRAP
Parameter: Amount
SLA_DISTORTER_AMOUNT
Parameter: X
SLA_DISTORTER_X
Parameter: Y
SLA_DISTORTER_Y
Parameter: Z
SLA_DISTORTER_Z
Parameter: Delta
SLA_DISTORTER_DELTA
Parameter: Step
SLA_DISTORTER_STEP
Parameter: Texture
SLA_DISTORTER_TEXTURE
Parameter: Distorter
SLA_DISTORTER_DISTORTER