If I upgrade a MYW one day ticket to an AP at WDW

[triplefigs]

can I get a DDE card at that time anywhere? Or do I have to buy the AP and order the DDE card before our trip?

Thanks!

 

[Seahunt]

Hmmm, looks like you should get prior :

MEMBERSHIP AND CARD INFORMATION: Call Disney's Dining Experience office at (407) 566-5858, Monday through Friday between 9 a.m. and 5 p.m. Membership is not available on property. Membership is only available by mail or phone.

BY MAIL: Disney's Dining Experience, Post Office Box 10000, Lake Buena Vista, FL 32830

BY PHONE: (407) 566-5858.

NOTE: Allow several weeks for processing. If you will visit Walt Disney World before you receive your membership card, you can arrange to pick up a letter of authorization from a Guest Relations office. You will need to show a photo I.D. to pick up this letter.
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Here's the link to the allears site discussing these:

http://www.allearsnet.com/din/dde.htm