C3DFile.CreateParameter

nStatus = C3DFile.CreateParameter( BYVAL nFile         AS INTEGER, 

                                   BYVAL strParameter  AS STRING,

                                   BYVAL nType         AS INTEGER,

                                  [BYVAL nRow         AS INTEGER=0],

                                  [BYVAL nCol         AS INTEGER=0],

                                  [BYVAL nDepth       AS INTEGER=0]    ) AS INTEGER

Create C3D parameter of type nType.  You can use the TYPE function for type or use the following

INTEGER     1

REAL        2

STRING      3

Parameter name should have the GROUP:NAME format

Example:

DIM strName AS STRING

strName = "Kalle Anka was here with Nils today"

C3DFile.CreateParameter( nFile, "POINT:KALLE", TYPE( strName ), LEN( strName ), 0, 0 )