In many places in FastReport, expressions are used. For example, the "Text" object can contain expressions in square brackets.
An expression is a code in C# or VB.Net language, which returns any value. For example:
2 + 2
An expression should be written in a language chosen as a script in a report. By default, it is C#. You can change the language in the "Report|Options..." menu by choosing the "Script" element in a window.
