This is used when creating Custom Add-On scripts to list only the Web Pages editable by the PageBuilder and hide all other system related pages.
Example of Registry source code:
<rfield name="Files list"> <rdata type="fieldtype">PageBuilderFilesListBox</rdata> <rdata type="label">Choose a Page</rdata> <rdata type="emptydefault">no</rdata> <rdata type="css_form_class"></rdata> <rdata type="css_form_style"></rdata> <rdata type="id"></rdata> </rfield>