How To Implement Substitution Variables In Access 2007

is there a way i can use substitution variables in access 2007, i wrote a query that returns rows which have a word okeu in them but i want to use substitution variables so that i can retrieve any word i want and if the word i want is not there i want to pop a message saying word not there its easier to do it in oracle sqlplus but how can i apply it in access using sql queries? This is my sql i made in access

Code:

SELECT MENU.NAME_REC, MENU.C_REC, AUTO.C_GROUP
FROM MENU, AUTO
WHERE (((MENU.NAME_REC)="okeu"));