Use this constant to get or set the format of a data field or table window column. The format of a field or column must agree with its data type, so this constant can only be returned by or applied to a string field. This constant is returned by the function SalFmtGetFormat when the format of a field or column is set to invisible, and it is used by the function SalFmtSetFormat to set a field or column's format to invisible. Value = 5

public const int FMT_Format_Invisible