vpn conneciton

I created vpn in B4A IDE and publish in google play This vpn work with v2ray and ovpn server link in google play

Hello is there any way or library to setup vpn connection on android ? i saw some android application that support many type of vpn connection like ( cisco , tls vpn, ssl connection, open vpn, pptp, l2tp ) all of them just in one application is there any way to do that via B4A ? or it should...