hide a query coloumn

hello;
i get  data with sql connection...
and bind it to empty griedview with dataset....
that is part work great...
but i want to hide one of fields on griedview...
i do not want to index field at griedview....
but i need it too..
and put it datakeynames....
but i can not hide index coloumn at query ....
if some one know how i can hide this field...
at dataset or griedview?
 
regards...
 
...