Thx John
you helped me very fast,
and i go try to do something on this injection,
but the reason that i will use a stordeproc like this:
i use  a lot of comboboxes in my program
on this way the user can type a new name or change a name  in the box and when
this name not exist de 2é part of the storedproc get add this name in the table
and  nobody see the result of the first part of my  storedproc

Thx for you help