MACROMEDIA FLASH MX 2004-USING COMPONENTS Use Manual page 653

Referencing loaded screens with ActionScript
The Loader class creates an internal movie clip named
or JPEG file specified by the
screen node between the "placeholder" slide (that you created in the "master" presentation above)
and the first slide in the loaded slide presentation.
For example, suppose the SWF file created for the Speaker_1 slide placeholder (see above
illustration) had the following structure, as shown in the Screen Outline pane:
"Speaker 1" SWF slide presentation structure
At runtime, when the Speaker 1 SWF file is loaded into the placeholder slide, the overall slide
presentation would have the following structure:
Structure of "master" and "speaker" presentation (runtime)
The properties and methods of the Screen, Slide, and Form classes "ignore" this
node as much as possible. That is, the slide named MyPresentation (along with its subslides) is
part of the contiguous slide tree rooted at the Presentation slide, and is not treated as a separate
subtree.
Screen class (API) (Flash Professional only)
Inheritance MovieClip >
Screen
ActionScript Class Name
property. This movie clip, in effect, adds an extra
contentPath
Inserted at runtime by Loader class
UIObject class > UIComponent class
mx.screens.Screen
into which it loads the SWF
contentNode
> View > Loader component
Screen class (Flash Professional only)
contentHolder
>
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