Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Weight
FRAG_GRADParameter: Threshold
FRAG_THRESHParameter: Variation
FRAG_VARParameter: From to
FRAG_FROMTOParameter: Type
FRAG_TYPEParameter: Angle
FRAG_SANGLEParameter: Radius
FRAG_SRADParameter: Count
FRAG_COUNTParameter: No Fragments
FRAG_NOFRAGParameter: Alignment Correction
FRAG_ALIGNCParameter: Thickness
FRAG_THICKParameter: Life Span
FRAG_LIFEParameter: Variation
FRAG_LIFEVARParameter: Speed
FRAG_SPEEDParameter: Variation
FRAG_SPEEDVARParameter: Remaining Type
FRAG_RTYPEParameter: Thickness
FRAG_RTHICKParameter: Die after Fragmentation
FRAG_DELPParameter: On
IN_FRAG_ONParameter: Animation Time
IN_FRAG_ATIMEParameter: Particle Count
OUT_FRAG_PARTICLECOUNTParameter: Particle Number
OUT_FRAG_PARTICLENUM