Once you know how to initialise Direct3D you are ready to start creating 3D worlds. There are quite a large number of things that need looking at. This section contains a number of notes on these.
Note that there is a demo application with source code showing off a working Direct3D application here: Cube Demo
Z Buffer- the depth buffer
Matrices - the matrices used by Direct3D
Lighting - the lights used by Direct3D
Rendering Primitives - drawing things!
Effects files - notes on using effect files (.fx)
3D Models - notes on rendering 3D models (X files)
Note: OpenGL and Direct3D vary in the axis system. In Direct3D x is right, y up and z in, like this.