Flash supports the AutoCAD DXF format in the release 10 version.
DXF files do not support the standard system fonts. Flash tries to map fonts appropriately, but the results can be unpredictable, particularly for the alignment of text.
Since the DXF format does not support solid fills, filled areas are exported as outlines only. For this reason the DXF format is most appropriate for line drawings, such as floor plans and maps.
You can import two-dimensional DXF files into Flash. Flash does not support three-dimensional DXF files.
Flash doesn't support scaling in a DXF file. All imported DXF files produce 12-inch by 12-inch movies that you can scale with Modify > Transform > Scale. Also, Flash supports only ASCII DXF files. If your DXF files are binary, convert them to ASCII before importing into Flash.