flashbuilder 4.5 can't find import flash.display.*;

i opened a flash pro project in flashbuilder 4.5 but it puts a question mark next to my import statements for example: im开发者_开发百科port flash.display.; I have tried rebuilding the project in a new folder. I have the latest SDK. why would Flashbuilder have a problem finding flash.display.; or import flash.events.*; very irritating is there a way to fix this or should i just continue to use textmate to code as3?

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I'm having this issue myself from time to time, even in current Flash Builder 4.5 (never figured out how to replicate it though).

To solve it do this:
Right click on your project in Project Explorer tab of Flash Builder > Properties
Once there select ActioScript Build Path > Library path > Add SWC folder
Select this directory C:\Program Files\Adobe\Adobe Flash CS5.5\Common\Configuration\ActionScript 3.0\FP9

(optionaly) If you wish to target FP10, add this dir instead C:\Program Files\Adobe\Adobe Flash CS5.5\Common\Configuration\ActionScript 3.0\FP10

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Try this:

import flash.display.*;

You were missing the .*

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This is what I found:

When I create a new Flash Professional project from FlashBuilder 4.5, the Flash IDE opens and my flash.display.Sprite import looks like it's broken.

If I close the Flash IDE, FlashBuilder opens it right back up again, and my imports look fine after that.

YMMV