Before a file writer can be used by an iTool to write a file, the file writer's class definition must be registered as being available to the iTool. Registering a file writer with the iTool links the class definition file that contains the actual IDL code that defines the file writer with a simple string that names the writer. Code that calls a file writer in an iTool uses the name string to specify which writer should be created.
In most cases, you will register a file writer with the iTool in the iTool's class Init method. Registration ensures that the file writer is available when the iTool attempts to use it to write a file. (See Creating a New iTool Class for details on the iTool class Init method.)
To register a file writer, call the IDLitTool::RegisterFileWriter method:
self->RegisterFileWriter, Writer_Type, WriterType_Class_Name, $ ICON = icon
where Writer_Type is the string you will use when referring to the file writer, WriterType_Class_Name is a string that specifies the name of the class file that contains the file writer's definition, and icon is a string containing the name of a bitmap file to be used in the preferences browser.
__define.promust exist somewhere in IDL's path for the file writer to be successfully registered.
See IDLitTool::RegisterFileWriter for details.
You can set any property of the IDLitWriter and IDLitComponent classes when registering a file writer. The following properties may be of particular interest:
Set this property to a string value giving the name of an icon to be associated with this object. Typically, this property is the name of a bitmap file to be used when displaying the object in a tree view. See Icon Bitmaps for details on where bitmap icon files are located.