Adventures of a Flex developer

So you have created your custom components and you want to use them in multiply projects, you could add the source to every project, or you could create a swc.  A swc is a compiled collection of classes.
Click to view the previous example with the custom component compiled into a swc.

Example
Source

You can easily create a swc from within Adobe Flex builder; simply create a new Flex library project.  The example used above to build the swc can be found here.

Source