Creating a Registration Resource File

The properties of the implementation are published in a compiled resource file. This file is known as the registration resource file of the implementation and has a.rss extension. The plug-in framework reads the resource files to find the interface implementations available on the system. In case of an implementation collection, the collection has one registration resource file and the properties of all the implementations of the collection are described in the file.

Context

The plug-in framework supports three versions of the resource structure types from which the registration resource files can be constructed:

The standard version that allows ROM-based plug-ins to be overridden by RAM-based plug-ins.
The version 2 (modified version) that can prevent the ROM-based plug-ins from being overridden by RAM-based plug-ins.
The version 3 (modified version) to accommodate extended interfaces.

Steps

Writing a Standard Registration Resource File
For Symbian OS V9.1 and onwards, the name of the standard registration resource file must be the same as that of the executable with .rss extension. All the registration resource structure types are defined in RegistryInfo.rh. This file has to be included in the registration resource file.
Writing the Version 2 Registration Resource File
Writing a version 2 registration resource file is similar to writing a standard registration resource file.
Writing the Version 3 Registration Resource File
The version 3 registration resource file is an evolution of the version 2 . This version is evolved to accommodate extended interfaces.