简单的实验d3d窗口的初始化，d3d初学者学习d3d制作的必经阶段.在运行时不要忘记设置sdk的包含文件跟库文件的路径-Simple experimental D3D initialization window, d3d beginners learning D3D production to go through. In the run-time settings sdk not forget the include file with the library file path