flex sdk actionscript 3 compile

can the 开发者_JAVA百科flex sdk compile actionscript files that imports flash controls ? I have

import fl.controls.TextArea;

as a import statement and it says Definition fl.controls:TextArea could not be found.

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The flex is using it's own TextArea component

mx.components.TextArea

or

spark.components.TextArea

depending on Flex SDK version you are using.