批处理设置锁屏壁纸

主要是通过修改注册表实现，C:\photo\hehua.jpg 为壁纸所在路径，可自定义修改

reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Personalization" /v "LockScreenImage" /t REG_SZ /d "C:\photo\hehua.jpg" /f
reg add "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v "Wallpaper" /t REG_SZ /d "C:\photo\hehua.jpg" /f
pause