Flex 3.4 and Flex4 Automation Delegate source code
If you are a Flex Automation test tool user/provider and trying to find how to get the source code of Automation Delegates for Flex SDK 3.4 and 4, get the beta of FlashBuilder downloaded.
FlashBuidler 4 (previously known as FlexBuilder) Beta2 is out and available on Adobe Labs. http://labs.adobe.com/technologies/flashbuilder4/ .
you can find the source from <installedlocation>/sdks/<sdkversion>/frameworks/projects starting with atuomation.