Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Projection
ID_CA_WEIGHT_TOOL_PROJECTION
Parameter: Visible Only
ID_CA_WEIGHT_TOOL_VISIBLE_ONLY
Parameter: Selected Only
ID_CA_WEIGHT_TOOL_SELECTED
Parameter: Auto Normalize
ID_CA_WEIGHT_TOOL_NORMALIZE
Parameter: Mode
ID_CA_WEIGHT_TOOL_MODE
Parameter: Strength
ID_CA_WEIGHT_TOOL_STRENGTH
Parameter: Curve
ID_CA_WEIGHT_TOOL_SPLINE
Parameter: Falloff
ID_CA_WEIGHT_TOOL_FALLOFF
Parameter: Pressure
ID_CA_WEIGHT_TOOL_PEN
Parameter: Radius
ID_CA_WEIGHT_TOOL_RADIUS
Parameter: Width
ID_CA_WEIGHT_TOOL_WIDTH
Parameter: Hardness
ID_CA_WEIGHT_TOOL_HARDNESS
Parameter: Curve
ID_CA_WEIGHT_TOOL_FALLOFF_CURVE
Parameter: Clamp
ID_CA_WEIGHT_TOOL_CLAMP_LOWER_ENABLE
Parameter: Lower
ID_CA_WEIGHT_TOOL_CLAMP_LOWER
Parameter: Clamp
ID_CA_WEIGHT_TOOL_CLAMP_UPPER_ENABLE
Parameter: Upper
ID_CA_WEIGHT_TOOL_CLAMP_UPPER
Parameter: Enable
ID_CA_WEIGHT_TOOL_SYMMETRY
Parameter: Mode
ID_CA_WEIGHT_TOOL_SYMMETRY_MODE
Parameter: Search
ID_CA_WEIGHT_TOOL_SYMMETRY_RAD
Parameter: Left
ID_CA_WEIGHT_TOOL_SYMMETRY_MODE_NAME_LEFT
Parameter: Right
ID_CA_WEIGHT_TOOL_SYMMETRY_MODE_NAME_RIGHT
Parameter: Coord
ID_CA_WEIGHT_TOOL_SYMMETRY_COORD
Parameter: Mirror
ID_CA_WEIGHT_TOOL_SYMMETRY_MIRROR
Parameter: Object
ID_CA_WEIGHT_TOOL_SYMMETRY_COORD_CUSTOM_OBJECT
Parameter: Display Weighting
ID_CA_WEIGHT_TOOL_ENABLE_DISPLAY
Parameter: Draw Falloff
ID_CA_WEIGHT_TOOL_DISPLAY_FALLOFF
Parameter: Draw Outline
ID_CA_WEIGHT_TOOL_DISPLAY_CURSOR
Parameter: Falloff While Painting
ID_CA_WEIGHT_TOOL_DISPLAY_MOUSEIN
Parameter: Cursor Color
ID_CA_WEIGHT_TOOL_DISPLAY_CURSOR_COLOR
Parameter: Falloff Color
ID_CA_WEIGHT_TOOL_DISPLAY_FALLOFF_COLOR
Parameter: Erase Color
ID_CA_WEIGHT_TOOL_DISPLAY_ERASE_COLOR