getting a queries criteria to lookup a value in a form

[Guest_imported]

i have to run a query in the backend of a database however i need the criteria to lookup a value in a form from the front end of the data base.
i have tried using the build feature however im not sure if there is a function within this that can lookup a textbox in a form from another database.

 

[robmoors]

You need to set up a sub-form and place it inside your main form. Attach your backend query of course to your sub-form. If you are looking up values in your front-end database and you want you BE to lookup values based on a FE value, then in the criteria for your BE query, put in: [FORMS]![FE FORM]![FE control name]