Hi kbaker,
Because you are using WindDraw, you must have Vision Development Module. With that, there are two ways to go about doing this. The easier of the two would be to use a free third party program:
http://www.softcodez.com/softwares.htmlFrom this thread:
http://forums.ni.com/ni/board/message?board.id=200&message.id=13789&requireLogin=False
a fellow AE uses this program for his projects.
The second way to do this would be to set up WindDraw to move one pixel at a time per forloop iteration. Then use IMAQ Copy to create a copy of each step along the way and then write that to an AVI.
Let me know if this helps.
Justin