用directX9 的d3dxsprite封装成的ddraw类，用于directX9 2D绘图，功能齐备，故命名为ddraw9.h，和ddraw9.cpp，编译需要dx9 sdk。-Directx9 with the d3dxsprite package DDraw into categories, for directX9 2D graphics, full-featured, so named ddraw9.h, and ddraw9.cpp, the compiler needs dx9