I try your code, but vfp return error in this string.

lcGraphData = lcGraphData + TRANSFORM( EVALUATE( FIELD( lnFld ) ) ) + IIF(
lnFld < lnFieldCount, CHR( 9 ), CHR( 13 ) + CHR( 10 ) )

Maybe problem with TRANSFORM(), in help file TRANSFORM(eExpression, cFormatCodes) have 2 arguments