CheckSystemVersion 用于检测系统版本 ＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝ //--------------- O.S string defines --------------------------------------------------------------------------------------- #define OS_UNKNOWN 0 #define OS_WIN95 1 #define OS_WIN98 2 #defin