Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Object
MINH_OBJECTParameter: Inheritance
MINH_INHERIParameter: Variation
MINH_VARParameter: Rotation Inheri.
MINH_ROTINHERIParameter: Variation
MINH_ROTVARParameter: Direction Var.
MINH_DIRVARParameter: Type
MINH_DTYPEParameter: Radius
MINH_DISTParameter: Distance Gradient
MINH_DGRADParameter: Cylinder Axis
MINH_CAXISParameter: Cylinder Height
MINH_CHEIGHTParameter: Cylinder Gradient
MINH_CGRADParameter: Scale Gradient
MINH_SGRADParameter: On
IN_MINH_ONParameter: Animation Time
IN_MINH_ATIME