| Flex 2 Developer's Guide > Customizing the User Interface > Using Skins > Creating themes | |||
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A theme is a collection of style definitions and skins that define the look and feel of a Flex application. Theme files can include both graphical and programmatic skins, as well as style sheets.
A theme takes the form of a SWC file that can be applied to a Flex application. You compile a SWC file using the compc command-line compiler utility.
By compiling a SWC file and then using that SWC file as a theme in your application, you remove the burden of compiling all the skin files when you compile your main application. This can make compilation faster and make problems with the application code easier to debug. In addition, a SWC file is easier to transplant onto another application than are a set of classes and image files.
For more information on creating and applying themes, see About themes.
Flex 2.01
