Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Orientation
MG_HONEYCOMB_ORIENTATIONParameter: Offset Direction
MG_HONEYCOMB_DIRECTIONParameter: Offset
MG_HONEYCOMB_OFFSETParameter: Offset Variation
MG_HONEYCOMB_OFFSET_VARIATIONParameter: Perpendicular Variation
MG_HONEYCOMB_VARIATIONParameter: Seed
MG_HONEYCOMB_SEEDParameter: Count Width
MG_HONEYCOMB_COUNT_XParameter: Count Height
MG_HONEYCOMB_COUNT_YParameter: Mode
MG_HONEYCOMB_MODEParameter: Size Width
MG_HONEYCOMB_SIZE_XParameter: Size Height
MG_HONEYCOMB_SIZE_YParameter: Form
MG_HONEYCOMB_FORMParameter: Spline
MG_HONEYCOMB_FORMOBJECT_LINK