Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Amplitude
WINDDEFORMOBJECT_AMPLITUDE
Parameter: Size
WINDDEFORMOBJECT_SIZE
Parameter: Frequency
WINDDEFORMOBJECT_FREQUENCY
Parameter: Turbulence
WINDDEFORMOBJECT_TURBULENCE
Parameter: fx
WINDDEFORMOBJECT_FX
Parameter: fy
WINDDEFORMOBJECT_FY
Parameter: Flag
WINDDEFORMOBJECT_FLAG