Flash buffer

Dear all,
just a tiny concern of mine, you know, it’s like when you download a flash file, my flash project have something like a blank the size of the flash project before the loading starts… Is there any way to control the color of that blank screen before the swf reader gets to frame 1 (the color of the background project is black but the blank space is white). I would not mind if my background was white but a huge white blank space looks funny on a black screen.
Thanks a lot.