[denNorske]

If you want only one command to work, you could check out this:

Код:

public OnPlayerCommandReceived(playerid, cmdtext[])
{
    if(DM[playerid] == 1 && strfind(cmdtext,"exitdm",true) == -1) //That will make only "/exitdm" to work, and none of the other commands.
    {
        SendClientMessage(playerid,-1,EMBED_RED"[ERROR]: "EMBED_WHITE"You can not use commands inside of a DM, please use "EMBED_RED"/exitdm"EMBED_WHITE".");
        return 0;
    }
	return 1;
}

only an Example