RegisterConversionType

function RegisterConversionType(

  Fam: TConvFamily;

  const S: string;

  Value: TConvUtilFloat

):TConvType;

function RegisterConversionType(

  Fam: TConvFamily;

  const S: string;

  const AToCommonFunc: TConversionProc;

  const AFromCommonFunc: TConversionProc

):TConvType;