vc mfc开发游戏的内容。
背景滚动以及粒子效果
	modified:   MFCGame2Exec/ChildView.cpp
	modified:   MFCGame2Exec/ChildView.h
	modified:   MFCGame2Exec/MFCGame2Exec.cpp
readme file was changed
	modified:   MFCGame2Exec/ReadMe.txt