Revit FBX format

I'm planning to use the FBX format to determine if it's possible to obtain more
information about a View3D in Revit. For this purpose, I've downloaded the FBX
SDK and installed it.

To test it, I've exported a Revit Architecture 2009 to FBX (via IDE and also
using the API), and after that, I've tried to use the samples that came with the
FBX SDK.

But I'm having some problems with the FBX files generated via Revit. When I try
to determine which file format are (using the "DetectFileFormat"
method), always returns 0 and fails.

For what I've seen, the last FBX SDK file format is the "6.1.0" (with
date 2006.11.1). It's obvious that the exported FBX files must be the same file
format version as the SDK, but I haven't found any way to determine the file
version of the exported files. I've tried with the "FBXExportOptions",
but has no parameters or methods exposed.

Is there some way that I can comunicate the exported file from Revit to an
application of my own that uses the FBX DSK libraries (version 6.1.0)?

Thanks in advance.