FldExist = (TYPE("MyTable.mycol") <> "U")

>FldsCnt = AFIELDS (aFlds, "MyTable")
>FldExist = .F.
>
>FOR I = 1 TO FldsCnt
>   IF aFlds [I, 1] == "MYCOL"
>      FldExist = .T.
>      EXIT
>   ENDIF
>ENDFOR
>