[PedexM]

I got underneath, but this tutorial only teaches How to Open, and is very outdated using useless things, it is better
to take a Handout on Logic Programming and implement, PAWN no future, it is useless!

#Edit

And Rcon Command:

pawn Code:

#include <zcmd>

CMD:gmx()//Simple Example of Rcon Command
{
    if(!IsPlayerAdmin) return SendClientMessage(playerid, -1, "Error : you dont have permissions for use the command");
    SendRconCommand("gmx");
    return 1;
}

There are easier ways, these ways you can teach is to harming a beginner!