This tutorial contains the Helworld.c example code, which creates a sphere, applies a texture to it, and rotates it in a window. This is the only C source file required to build this application. The only other files you need are Sphere3.x, a mesh file that ships in the Media directory of the DirectX SDK, and tutor.bmp, a bitmap you supply. (Note that you must have the Direct3D header files in your include path and link to the Winmm.lib, D3drm.lib, and Ddraw.lib static libraries.)
This tutorial is a simplied version fo the Globe sample that is part of the DirectX SDK. The Globe sample, like all the Direct3D Retained-Mode samples in the SDK, requires the inclusion of a file named Rmmain.cpp and a number of header files. In Helworld.c, the relevant parts of Rmmain.cpp have been converted to C from C++ and integrated into the source code.
The code shown in this tutorial should not be mistaken for production code. The only possible user interactions with the program are starting it, stopping it, and minimizing the window while it is running. Most of the error checking has been removed for the sake of clarity. The purpose of this example is analogous to the purpose of the beginning program that prints "Hello, world!" on the screen: to produce output with as little confusion as possible.