The function returns the description of given column of specified
structure (or structure definition) as a text. Column is given by its serial
number. Expression of Hbj type returns an
object attribute \HBJ.
If column is not from the structure (or structure definition) range or the
object is not the structure (or structure definition), the function returns
an invalid value.
_iHbj := %StrToHBJ("SV.DATA")
_iCol := 1
_bOk := %OpenRefToObject(_iHbj,@TRUE)
IF _bOk THEN
_description := %GetColDescript(_iHbj,_iCol)