dos 命令，在规定时间关闭指定程序。或者全部正在运行的程序

可以的。用AT命令

Usage:shutdown [-i| -l| -s| -r| -a] [-f] [-m \\computername] [-t xx] [-c "comments'] [-d up:xx:yy]

No args Display this message <same as -?>
-i Display GUI interface, must be the first option
-l Log off <cannot be used with -m option>
-s Shutdown the computer
-r Shutdown and restart the computer
-a Abort a system shutdown
-m \\computername Remote computer to shutdown/restart/abort
-t xx Set timeout for shutdown to xx seconds
-c "comment" Shutdown comment <maximum of 127 characters>
-f Forces running applications to close without warning
-d [u][p]:xx:yy The reason code for the shutdown
u is the user code
p is a planned shutdown code
xx is the major reason code <positive integer less than 256>
yy is the mi