Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Algorithm
ID_REMESHALGORITHMParameter: Polygon Type
ID_REMESH_POLYGONTYPEParameter: Polygon Target Mode
ID_REMESH_POLYGONTARGET_MODEParameter: Mesh Density
ID_REMESH_POLYGONSCALEParameter: Polygon Count
ID_REMESH_POLYGONTARGETParameter: Density Map
ID_REMESH_QUADREMESH_DENSITYMAPParameter: Density Scale
ID_REMESH_QUADREMESH_DENSITYMAP_SCALEParameter: Keep Outline
ID_REMESH_KEEPOUTLINEParameter: Keep Creases
ID_REMESH_CREASESParameter: Edge Angle
ID_REMESH_EDGEANGLEParameter: Smooth Iterations
ID_REMESH_SMOOTHITERATIONSParameter: Only Quadrangles
ID_REMESH_QUADONLYParameter: Adaptive Count
ID_REMESH_QUADREMESH_ADAPTIVEParameter: Adaptiveness
ID_REMESH_QUADREMESH_ADAPTIVENESSParameter: Detect Hard Edges
ID_REMESH_QUADREMESH_HARDEDGEMODEParameter: Hard Edge Selection
ID_REMESH_QUADREMESH_HARDEDGESELECTIONParameter: Symmetric X
ID_REMESH_QUADREMESH_SYMMETRYXParameter: Symmetric Y
ID_REMESH_QUADREMESH_SYMMETRYYParameter: Symmetric Z
ID_REMESH_QUADREMESH_SYMMETRYZParameter: Flow Splines
ID_REMESH_GUIDE_SPLINESParameter: Transfer Attributes
ID_REMESH_TRANSFER_ATTRIBUTES