C# HID application help

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C

C#

microcontroller

data

event

PIC

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Hi every1....

Im trying to communicate my PIC (18f4550) micro controller with PC using USB HID, and a DLL driver. The host application is developed in C#. The data send to the pc is collected using Event catcher function. Communication, data receiving all the stuffs going well.
Though I speedup the data rate inside the micro controller program, the C# app does not display a significant data receiving rate, I think the problem might occur inside the event catcher function. I'll put both codes here...

Eg:- I send my data buffer at 500uS or 1mS speed to the pc, but the text box is not updated to given speed.

using System;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Collections.Generic;
using USBHIDDRIVER;


namespace My_NEWWW_HID_CS{
   
    public partial class Form1 : Form{
        
        USBHIDDRIVER.USBInterface usb = new USBInterface("vid_1234", "pid_1234");
               
        public Form1(){
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e){

        }

        private void button1_Click(object sender, EventArgs e){
            try {
                usb.Connect();
                if (usb.Connect() == true)
                    MessageBox.Show("Connected !!!");
                else
                    MessageBox.Show("Not Connected !!!");
            }catch(Exception er){
                MessageBox.Show("BAAA");
            }
         }

        private delegate void setTextDelegate(byte []array);
        
        // set and update a text box using received data from microcontroller

        private void setText(byte []array){
            if (this.Outbox.InvokeRequired){
                this.Outbox.Invoke(new setTextDelegate(this.setText), array);
            }else{
                this.Outbox.Text = this.Outbox.Text + "\r\n" + array[1].ToString();
                this.Outbox.SelectionStart = Outbox.Text.Length;
                this.Outbox.ScrollToCaret();
                this.Outbox.Refresh();
            }
        }

        private void button3_Click(object sender, EventArgs e){
            byte[] DataWrite = new byte[64];
            if (usb.Connect() == true){
                DataWrite[0] = byte.Parse(textBox1.Text);
                usb.write(DataWrite);
                usb.enableUsbBufferEvent(new System.EventHandler(myEventCatcher));
                Thread.Sleep(5);
                usb.startRead();
                MessageBox.Show("Data Reading!");
                //Thread.Sleep(2000);
                usb.stopRead();
                DataWrite[0] = 20;
                usb.write(DataWrite);
            }
        }
        //this is the event catcher !!!
        public void myEventCatcher(object sender,System.EventArgs e){
            //MessageBox.Show("Event Caught");
            if (USBHIDDRIVER.USBInterface.usbBuffer.Count > 0){
                byte[] currentRecord = new byte[64]; 
                int counter = 0;
               
              while ((byte[])USBHIDDRIVER.USBInterface.usbBuffer[counter] == null){
                    lock (USBHIDDRIVER.USBInterface.usbBuffer.SyncRoot){
                        USBHIDDRIVER.USBInterface.usbBuffer.RemoveAt(0);
                    }
              }
                
                currentRecord = (byte[])USBHIDDRIVER.USBInterface.usbBuffer[0];
               
                lock (USBHIDDRIVER.USBInterface.usbBuffer.SyncRoot){
                    USBHIDDRIVER.USBInterface.usbBuffer.RemoveAt(0);
                }
                setText(currentRecord); //update text box with received data
                
            }
         }

           }//end class

}//end namespace

Micro controller code - (just to give an idea, i know this is not the place)

HID_Enable(&readbuff,&writebuff);

  while(1){
     if(HID_Read()){
         Lcd_Cmd(_LCD_CLEAR);
         ByteToStr(readbuff[0],txt);

         if(readbuff[0]==10){
            writebuff[0]=2;
            while(!HID_Read()){
              HID_Write(&writebuff,64);
              Delay_us(500);
            }

         }else{
            while(!HID_Read()){
               Lcd_Out(1,10,txt);
            }
         }
     }

Can some1 please explain me how can I speed up data receiving rate in C# code ? Can I modify my event catcher code for it ???

Thanx
Regards
Anuradha