4-7 多背景循环动画 ..................\canvas.aps ..................\canvas.cpp ..................\canvas.dsp ..................\canvas.dsw ..................\canvas.h ..................\canvas.ncb ..................\canvas.opt ..................\canvas.plg ..................\canvas.rc ..................\ReadMe.txt ..................\resource.h ..................\StdAfx.cpp ..................\StdAfx.h