This content is no longer actively maintained. It is provided as is, for anyone who may still be using these technologies, with no warranties or claims of accuracy with regard to the most recent product version or service release.

expression

Any combination of operators, constants, literal values, functions, and names of fields (columns), controls, and properties that evaluates to a single value. You can use expressions as settings for many properties and action arguments; to define calculated controls in forms, reports, and data access pages; to set criteria (search conditions) or define calculated fields in queries; and to set conditions in macros. In a Microsoft Access project, you can use expressions to define check constraints.

You also use expressions in Microsoft Visual Basic.