Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Objects
OP_BLURP_OBJECTSParameter: Animation Phase
OP_BLURP_PHASEParameter: Stay
OP_BLURP_STAYParameter: Frag
OP_BLURP_FRAGParameter: Next
OP_BLURP_NEXTParameter: In Tangent
OP_BLURP_INTANGENTParameter: Out Tangent
OP_BLURP_OUTTANGENTParameter: From to
OP_BLURP_FROMTOParameter: Type
OP_BLURP_TYPEParameter: Angle
OP_BLURP_SANGLEParameter: Radius
OP_BLURP_SRADParameter: Count
OP_BLURP_COUNTParameter: Thickness
OP_BLURP_THICKParameter: No Fragments
OP_BLURP_NOFRAGParameter: Remaining Type
OP_BLURP_RTYPEParameter: Thickness
OP_BLURP_RTHICKParameter: On
OP_BLURP_IN_ONParameter: Animation Time
OP_BLURP_IN_ATIMEParameter: Remaining Count
OP_BLURP_OUT_REMAININGCOUNTParameter: Remaining Number
OP_BLURP_OUT_REMAININGNUMParameter: Fragment Count
OP_BLURP_OUT_FRAGMENTCOUNTParameter: Fragment Number
OP_BLURP_OUT_FRAGMENTNUM