Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Default Format
PBODYPAINT_DEFAULTTEXTUREFORMAT
Parameter: Show on Mouse Move
PBODYPAINT_SHOWBRUSHMOUSEMOVE
Parameter: Show while Painting
PBODYPAINT_SHOWBRUSHPAINTING
Parameter: Tool Cursors
PBODYPAINT_TOOLCURSOR
Parameter: Pixel Border around UV Poly
PBODYPAINT_PIXELBORDER
Parameter: Tile U
PBODYPAINT_TILEU
Parameter: Tile V
PBODYPAINT_TILEV
Parameter: Project on Invisible Parts
PBODYPAINT_PROJECTON
Parameter: Ignore Unpaintable Geometry
PBODYPAINT_PP_PROJECT_THROUGH_UNPAINTABLE
Parameter: Border on Same Object
PBODYPAINT_BORDERON
Parameter: Continue UVs on Border
PBODYPAINT_CONTINUE
Parameter: Preview Width
PBODYPAINT_FILTER_WIDTH
Parameter: Preview Height
PBODYPAINT_FILTER_HEIGHT
Parameter: Show Source Preview
PBODYPAINT_FILTER_SHOWPREV