[S4t3K]

I didn't really understand.

A dialog is unique by definition : when a player shows a dialog, you act on a "playerid" var, and playerid is the id of each player who shows the dialog.

So a code like that

PHP код:


new cp[MAX_PLAYERS];
CMD:sellguns(playerid, params[])
{
      cp[playerid] = CreateDynamicCP(params);
      return 1;
}
public OnPlayerEnterDynamicCP(playerid, checkpointid)
{
      foreach(new p : Player)
      {
            if(cp[p] == checkpointid)
            {
                  SetPVarInt(playerid, "WeaponSeller", p);
                  return ShowPlayerDialog(playerid, DIALOG_WEAPONS, DIALOG_STYLE_LIST, "Buying weapons", "M4\nAk-47\n", "Buy", "Close");
            }
      }
      return 1;
}
public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
      if(dialogid == DIALOG_WEAPONS)
      {
            if(!response) return 1;
            if(listitem == 0)
            {
                  GivePlayerWeapon(playerid, 31, 999);
                  GivePlayerMoney(playerid, -price_of_the_m4);
                  GivePlayerMoney(GetPVarInt(playerid, "WeaponSeller"), price_of_the_m4);
                  return 1;
            }
            else if(listitem == 1)
            {
                  GivePlayerWeapon(playerid, 30, 999);
                  GivePlayerMoney(playerid, -price_ak_47);
                  GivePlayerMoney(GetPVarInt(playerid, "WeaponSeller"), price_ak_k7);
                  return 1;
            }
      }
      return 0;
}
public OnPlayerExitDynamicCP(playerid, checkpointid)
{
      foreach(new p : Players)
      {
            if(checkpointid == cp[p]) DeletePVar(playerid, "WeaponSeller");
      }
} 


Will work as a charm.