Use Expressions In Design Mode

Expressions are conditions or functions that applications evaluate to produce specific types of values. You can use expressions to define conditions such as rules, input constraints, and preconditions. The Page expression form is of the same record type as the page. The expression loads no user interface up front with the page itself, just pieces of data for use in expressions elsewhere on the page.

Warning: Working with expression requires some knowledge of SQL.

Expressions leverage the full VB.NET syntax. For example, to change the constituent page caption to include the constituent name and the date/time stamp, you would use the following expression:

=Fields!NAME & “ “ & date.now

The fields included in the Available Fields box of the Expression screen are determined by the ExpressionDataForm.