求解释一下 这段代码

sub RegRun()
on error resume next
dim wsh
set wsh=createobject("wscript.shell") wsh.regwrite "HKLM\Software\Microsoft\Windows\Currentversion\Run\" & app.exename,app.path & "\" & app.exename & ".exe",REG_SZ"
end sub
目测是写注册表
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run是控制计算机启动项的注册表信息`