Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Towards
HAIR_TOOL_CLUMP_TO
Parameter: Keep Lengths
HAIR_TOOL_CLUMP_FIXED_LENGTH
Parameter: Strength
HAIR_TOOL_CLUMP_STRENGTH
Parameter: Curve
HAIR_TOOL_CLUMP_CURVE
Parameter: Rotate
HAIR_TOOL_CLUMP_ROTATE
Parameter: Rotation
HAIR_TOOL_CLUMP_FREQ
Parameter: Curve
HAIR_TOOL_CLUMP_FREQ_CURVE