Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Redraw
HAIR_TOOL_DYNAMICS_REDRAWParameter: Time
HAIR_TOOL_DYNAMICS_TIMEParameter: Dynamics
HAIR_TOOL_DYNAMICS_DYNAMICSParameter: Collisions
HAIR_TOOL_DYNAMICS_COLLISIONSParameter: Gravity
HAIR_TOOL_DYNAMICS_GRAVITYParameter: Stiffness
HAIR_TOOL_DYNAMICS_STIFFNESSParameter: Forces
HAIR_TOOL_DYNAMICS_FORCESParameter: Reset
HAIR_TOOL_DYNAMICS_RESET