[R0]

pawn Код:

enum
{
    DIALOG_ADMIN    
}
#define DIALOG_ADMIN 966 // used 996 to avoid having another dialog with same id in your script

ShowPlayerDialog(playerid, DIALOG_ADMIN, DIALOG_STYLE_MSGBOX, "Admin Commands", "General Admin: /kick, /ban", "Close", ""); // like that

If you want to make like Fred's dialog it should be list not MSGBOX,just use mine