FormatMethod

The next required item is the FormatMethod. This is the invocation of a method that formats the field value for display in the Frame Display window. The value may be displayed in the Decode Pane, the Summary Pane, the collapsed decode line, or all of these. Common formatting methods include Decimal and Hex which encode integers in the appropriate base, and Table which looks up the value in a table to find a corresponding string. There are also methods for formatting character data and various other things.

The size of the field (as defined by the SizeMethod) is available to formatting methods so you can depend on appropriate significance in the encoding. Thus with a field to be formatted as a character string, the formatting method knows how many characters it should process; it does not look for a terminator or anything like that.