enumUnderline

typedef enum
{
  fontunderline_none             = 0,
  fontunderline_simple           = 1,
  fontunderline_double           = 2,
  fontunderline_accounting       = 3,
  fontunderline_doubleaccounting = 4
} enumUnderline;

used in IXlsFont::Underlined property,
used in IXlsChartFont::Underlined property.