Code Element (RDL)
Contains definitions for custom functions to be used in the report.
Functions contained within the Code element must be written in Microsoft Visual Basic .NET and must be instance methods. For information about writing custom code and using the functions contained within the Code element in a report, see Using Custom Code References in Expressions (Reporting Services).
The code from the Code element of a report and from your custom assemblies is instantiated into a Code object when the report is run. In some cases, you may need to override the default OnInit method for this object to initialize your custom classes with values from the global collections in the report. For information about initializing the Code object using OnInit, see Initializing Custom Assembly Objects.