windows commandline 获取返回值

今天遇到一个问题，window command line里面需要获取返回值，开始以为是echo $?.但是实际发现这个是不对的。

 

应该是%errorlevel%

 

C:/Documents and Settings/Administrator>echo y | plink -v -C -ssh Administrator
@  9.123.241.119  -pw password
Looking up host "Administrator"
Unable to open connection:
Host does not exist
C:/Documents and Settings/Administrator>echo %errorlevel%
1