[FahadKing07]

pawn Код:

public OnPlayerCommandPerformed(playerid, cmdtext[], success)
{
    if(!success)
    {
            new string[1029];
            strcat(string, "Sorry! The Command You Typed Does Not Exits!!\n");
            strcat(string, "To see The Commands Type /Cmds\n");
            strcat(string, "For More Help Type /Help Or \n");
                   strcat(string, "Tell Your Problem To Our Server Admins\n");
            strcat(string, "Click The OK Button\n");
                   ShowPlayerDialog(playerid, 11, DIALOG_STYLE_MSGBOX, "RG-Info: Wrong Command......" , string," Ok  ");
    }
    return 1;
}

Or see this http://pastebin.com/mYcgwG8F