Thanks for the interest. It´s a submarine sim called “SubCommand” (http://www.sonalystscombatsimulations.com/sub_command/index.html)
I knew about the dll. The problem is that to install Winsock2 (which I found) I need to add a TCP/IP protocol. Which I did.
But just after doing so, Win95 starts asking a password on startup, and at the password screen, none of Magic DOSBOX controls work at all. Can´t move the pointer, can´t write the name. The sad part is that if I could just write the name once without a password, then I wouldn´t get that screen ever again.