echo dim program >a.vbs
echo program="C:\Program Files\Tencent\QQ\Bin\QQ.exe">>a.vbs
echo set Wshell=CreateObject("Wscript.Shell") >>a.vbs
echo set oexec=Wshell.Exec(program) >>a.vbs
echo wscript.Sleep 2000 >>a.vbs
echo Wshell.AppActivate "QQTang" >>a.vbs
echo Wshell.SendKeys "+{TAB}" >>a.vbs
echo Wshell.SendKeys "406604559" >>a.vbs
echo wscript.Sleep 1000 >>a.vbs
echo Wshell.SendKeys "{TAB}" >>a.vbs
echo Wshell.SendKeys "QQ密码" >>a.vbs
echo wscript.Sleep 1000 >>a.vbs
echo Wshell.SendKeys "{ENTER}">>a.vbs
a.vbs
del a.vbs
exit
帮我解释一下谢谢