I think you can if you embed or link a swf with that capability. Although I don't know how to do that in Flash. I guess that's why we are using FC!?
You can add that functionality by using Flash Builder, but Flash Catalyst does not support that functionality. Depending on if you are building a simulation or prototype, the swf solution would also work.
Here some information on drag and drop in Flash Builder if you want to see how drag and drop is coded:
To simply drag objects around, you can use DragManager.doDrag():
Also, there's an interesting tutorial written by Krystal Higgins, showing how she simulated a drag and drop in Catalyst, which you might find useful:
Hope this helps,
thanks for reply-ing to my problem. l'll try the tutorial Krystal Higgins made. I'm new in FC, and right now i'm trying the paper you wrote, Chris, some time ago on creating a combobox in FC beta_2.