urgent , how to use maya files in directX

How I can use my maya and 3ds Max models on my game using Maya 7 , 3ds Max 8.0 and DirectX SDK 9

Game Technologies: DirectX, XNA, XACT, etc.8

You must export your models to .X format, then you can use them simply using DirectX.
Hope this helps a bit.

how can I export them

That's really a question for whatever modeling tool you're using. If you can't figure that out, you might want to post on forums specifically for those tools (Maya or Max).

We've had some success with using Milkshape as an intermediate tool. Here's the process we use ...

1. Export your Maya model as an OBJ file

2. Use Milkshape to open the OBJ file

3. The textures won't always show up in Milkshape so you'll have to reset those, but the U-V data seems to be there so the textures snap right into place.

4. Export the model from Milkshape into .X format

Now you're ready to use the model in DirectX. The process is a round about way of doing it, but's a quick process and it hasn't failed us yet. However, we've only tested it on static meshes that we animate ourselves in DirectX. We have not attempted to export any models that contain animations.

Hope this helps.

The directx sdk contains plug-in exporters for Maya 6, 6.5 and 7

They are installed here e.g.

C:\Program Files\Microsoft DirectX SDK (June 2006)\Utilities\Bin\PlugIns\Maya\Binary7\Plug-ins