public void btnSendMessage() {
        try
        {
            //test su dung textPane  de hien thi HTML
            MessageB = new StringBuilder();
            MessageB.append(UserName + " :");
            //Chèn định dạng chữ nếu có
            if(Bold)
                MessageB.append("<b>");
            if(Under)
                MessageB.append("<u>");
            if(Italic)
                MessageB.append("<i>");
            MessageB.append("<font face = \"" + FontName + "\" size=" + FontSize_HTML + " color = \"" + ColorName + "\">");
            MessageB.append("  ");
            MessageB.append(jTextArea_Input_Message.getText());
            MessageB.append("</font>");
            if(Italic)
                MessageB.append("</i>");
            if(Under)
                MessageB.append("</u>");
            if(Bold)
                MessageB.append("</b>");
            Message = clsClient.ProcessMessage(MessageB.toString());
            clsClient.AddMessageToPanel(Message,imageBgURL);
            jTextArea_Input_Message.setText("");
            parent.SendPrivate("PRIVATE::" + UserNameToChat + "--" + Message);
            btnSend.setEnabled(false);
        }
        catch(Exception ex)
        {
            JOptionPane.showMessageDialog(null, "Có lỗi: " + ex.getMessage());
        }
    }