[ViruZZzZ_ChiLLL]

Basically it's like this :

pawn Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
  if(strcmp("/enter", cmdtext, true, 6) == 0)
  {
    SetPlayerPos(playerid, Float:X, Float:Y, Float:Z);
    SetPlayerInterior(playerid, InteriorID);
    return 1;
  }
  return 0;
}

But I recommend you to use dcmd or zcmd (If your using the command method shown above ^ )

If you want Interior ID resources with Pictures,
please do refer here :
http://weedarr.wikidot.com/interior