importing mx.graphics.codec.*

I am trying to import a FlashDevelop project into Flash Builder. I simply started an ActionScript project and dragged and dropped files & created packages as needed, selected "Set开发者_开发问答 as Default Application" on the main file .as file and deleted the default application .as file.

But when I compile I get the following errors

1172: Definition mx.graphics.codec:JPEGEncoder could not be found.
        line 15 Flex Problem
1172: Definition mx.graphics.codec:PNGEncoder could not be found.   
                line 16 Flex Problem
1180: Call to a possibly undefined method JPGEncoder.
                line 175 Flex Problem

In my build path I have Flex 4.5.1 and for framework linkage I am doing "Merged into code". I see in help for adobe that the classes are part of the core for Flex 4.5.1.

So not sure what I am doing wrong? I only want to compile a swf and I am pretty sure FlashDevelop was doing the same before.

mx.graphics.* is under framework.swc not in mx.swc, the lib does not get added in an AS project. Thought I would just answer.

In case there is anyone still seeking, copy the swc from Flex SDK:

flex_sdk\frameworks\libs