to create Whiteboard component

Question

How do I create a simple drawing board/whiteboard functionality in Flex ?

Answer 1

Here is opensource solution for your question.

Blog post http://www.jamesward.com/blog/2006/08/16/flex-paint-flex-display-object-to-png/

Source code at SourceForge http://sourceforge.net/project/showfiles.php?group_id=174131

Answer 2

http://tv.adobe.com/#vi+f1472v1007

This gives more than enough info to get you started