Using Directx9 in 2d programming ?

try search for info on the ID3DSprite interface, it's basically an accelerated version od directdraw.

A great book would be "Beginning Game Programming" by Jonathan S. Harbour

The latest DirectX SDK has a "Simple2D" sample you can look at.

Direct3D does not have a "2D" mode (neither does OpenGL, for that matter). What is traditionally done is an approximation to such a mode by embedding everything into a plane, implicitly, and/or using an orthographic projection.

The SDK sample should give you some ideas. Google can also help.

Thanks very much.

Here you can find my (old) list of articles for 2D in DX:
Most links should still be good.