英文全称Windows Version，中文解释Windows系统版本
WINVER defines the minimum Windows system the program can run on. There's a more detailed explanation at MSDN. What #define WINVER 0x0501 means is that the program requires Windows XP or Server 2003 to run， and that it therefore can use Windows functionality up through that release.
winver定义了程序可以运行的最低Windows系统。MSDN上有更详细的解释。#define WINVER0x0501的意思是，该程序需要Windows XP或Server2003才能运行，因此它可以在该版本中使用Windows功能。
