请教大虾：我用ehlib3.0中的dbgrideh控件时怎么回事？(50分)

delphi提示：
function TColumnEh.DefaultReadOnly: Boolean;
var
Grid: TCustomDBGridEh;
begin
Grid := GetGrid;
Result := (Assigned(Grid) and Grid.ReadOnly) or (Assigned(Field) and FField.ReadOnly);
end;
该函数下;
Result := (Assigned(Grid) and Grid.ReadOnly) or (Assigned(Field) and
错误。为什么？？？？？

用的是哪种版本？

3.0