enable_lan_disable_wifi.bat

NETSH interface set interface name="Ethernet" admin=ENABLE
NETSH interface set interface name="Wi-Fi" admin=DISABLED
REG add "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v ProxyEnable /t REG_DWORD /d 1 /f

enable_wifi_disable_lan.bat

NETSH interface set interface name="Wi-Fi" admin=ENABLE
NETSH interface set interface name="Ethernet" admin=DISABLED
REG add "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v ProxyEnable /t REG_DWORD /d 0 /f
REM if you want to use another proxy server: 
REM reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings" ^
    REM /v ProxyServer /t REG_SZ /d proxyserveraddress:proxyport /f

network_switch.bat

REM check if Wifi is enabled then disable wifi, enable ethernet, 
REM else enable wifi, disable ethernet. 
REM there is a command for get current status but how to check using code? [netsh interface show interface]
REM C:\Users\longnx>netsh interface show interface
REM 
REM Admin State    State          Type             Interface Name
REM -------------------------------------------------------------------------
REM Disabled       Disconnected   Dedicated        VirtualBox Host-Only Network
REM Enabled        Connected      Dedicated        Local Area Connection* 13
REM Enabled        Connected      Dedicated        Wi-Fi
REM Disabled       Disconnected   Dedicated        Ethernet
REM 
REM 
REM C:\Users\longnx>