C# Code 4 USB

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;
using System.IO.IsolatedStorage;
using System.IO.Compression;
using System.IO;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace WindowsApplication1
{

public partial class Form1 : Form
{

public Form1()
{
InitializeComponent();

}

/*private class SP_DEVINFO_DATA
{
public int cbSize;
public Guid ClassGuid;
public int DevInst; // DEVINST handle
public ulong Reserved;
};*/
/*[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int MessageBox(IntPtr hWnd, String text, String caption, uint type);
*/

private class Sp_DEVICE_INTERFACE_DETAIL_DATA
{
public int cbsize;
public string Devicepath;
}

private class SP_DEVICE_INTERFACE_DATA
{
public int cbSize;
public Guid InterfaceClassGuid;
public int FLAGS;
public int Reserved;
};

//Step1: Obtaining the Device Interface Guid
[DllImport("hid.dll")]
private static extern void HidD_GetHidGuid(ref Guid GUID);
//end step1: Obtaining the Device Interface Guid

//Step 2: requesting a pointer to a device Information Set
[DllImport("setupapi.dll",CharSet=CharSet.Auto)]
private static extern IntPtr SetupDiGetClassDevsA(ref Guid ClassGuid, UInt32 Enumerator,IntPtr hwndParent, UInt32 Flags);
IntPtr deviceinfoset;
//End Step 2: requesting a pointer to a device Information Set

//Step3: Identifying a Device Interface
[DllImport("setupapi.dll")]
private static extern Boolean SetupDiEnumDeviceInterfaces(IntPtr DeviceInfoSet, int DeviceInfoData, ref Guid InterfaceClassGuid, int MemberIndex, ref SP_DEVICE_INTERFACE_DATA DeviceInterfaceData);
SP_DEVICE_INTERFACE_DATA MyDeviceInterfaceData = new SP_DEVICE_INTERFACE_DATA();
int MemberIndex;
Boolean Result;
//End Step3: Identifying a Device Interface

//Step4: requesting a structure containing the Device Path Name
[DllImport("setupapi.dll", CharSet = CharSet.Auto)]
private static extern Boolean SetupDiGetDeviceInterfaceDetail(IntPtr DeviceInfoSet, ref SP_DEVICE_INTERFACE_DATA DeviceIntefaceData, IntPtr DeviceInterfaceDetailData, int DeviceInterfacedetailDatasize, ref int DeviceInterfacedetaildataSize, IntPtr DeviceInfoData);
int BufferSize;
Boolean Success;
int counter;
//End Step4: requesting a structure containing the Device Path Name

/*[DllImport("setupapi.dll")]
private static extern Boolean SetupDiEnumDeviceInfo(IntPtr DeviceInfoSet, UInt32 MemberIndex,SP_DEVINFO_DATA DeviceInfoData);
*/

private void Form1_Load(object sender, EventArgs e)
{
counter = 0;
//Form Load code
//Step1: code to call step1(Obtaining the Device Interface Guid)(GUID: Globally Unique identifier)

Guid HidGuid = new Guid();
HidD_GetHidGuid(ref HidGuid);
//End Step1: code to call step1(Obtaining the Device Interface Guid)(GUID: Globally Unique identifier)

//Step2: code to call step2(Identifying a device interface)(A call to SetupDiEnumdevicesInterface retrieves a pointer to a structure that identifies a specific device interface in the previously retrieved Deviceinfoset array)

const int DIGCF_PRESENT = (0×00000002);

//const int DIGCF_DEVICEINTERFACE = (0×00000001);
deviceinfoset = SetupDiGetClassDevsA(ref HidGuid, 0, IntPtr.Zero, DIGCF_PRESENT);
//Display
label1.Text = “Device Info Set = ” + deviceinfoset.ToString();
label2.Text = “HidGuid = ” + HidGuid.ToString();
//End dispaly
//End Step2: code to call step2

//Step3: Identifying a Device Interface
MyDeviceInterfaceData.cbSize = 28;
MyDeviceInterfaceData.InterfaceClassGuid = System.Guid.Empty;
MyDeviceInterfaceData.FLAGS = 0;
MyDeviceInterfaceData.Reserved = 0;
MemberIndex=0;
Result=SetupDiEnumDeviceInterfaces(deviceinfoset,0,ref HidGuid,MemberIndex,ref MyDeviceInterfaceData);
//Display
label3.Text = “Result = ” + Result.ToString();
//End Display
//End Step3: Identifying a Device Interface

//Step4: requesting a structure containing the Device Path Name
Success = SetupDiGetDeviceInterfaceDetail(deviceinfoset, ref MyDeviceInterfaceData, IntPtr.Zero, 0, ref BufferSize, IntPtr.Zero);
MessageBox.Show(“success = ” + Success.ToString(),”USB Alert!!!!”);
IntPtr detailDataBuffer;
detailDataBuffer = Marshal.AllocHGlobal(BufferSize);
Marshal.WriteInt32(detailDataBuffer, 4 + Marshal.SystemDefaultCharSize);
Success = SetupDiGetDeviceInterfaceDetail(deviceinfoset, ref MyDeviceInterfaceData, detailDataBuffer, BufferSize, ref BufferSize, IntPtr.Zero);
MessageBox.Show(“New success = ” + Success.ToString(), “USB Alert!!!!”);
//Display
label4.Text = “New success = ” + Success.ToString();
//End Display
//End Step4: requesting a structure containing the Device Path Name

//step5: Extracting the Device Path Name
string Devicepathname;
IntPtr pDevicePathName;
pDevicePathName = new IntPtr(detailDataBuffer.ToInt32() + 4);
Devicepathname = Marshal.PtrToStringAuto(pDevicePathName);
Marshal.FreeHGlobal(detailDataBuffer);
//display
label5.Text = “path name = ” + pDevicePathName.ToString();
label6.Text = “device path name = ” + Devicepathname;

MessageBox.Show(“path name = ” + pDevicePathName.ToString(), “USB Alert!!!!”);
MessageBox.Show(“device path name = ” + Devicepathname, “USB Alert!!!!”);
label7.Text = “File Exists = ” + File.Exists(Devicepathname).ToString();
//End Display

//End step5: Extracting the Device Path Name
//End Form Load code
timer1.Interval = 200;
timer1.Start();

//label3.Text = Success.ToString();
//MessageBox.Show(“Hello”);

/*FileVersionInfo fversinfo;
FileInfo finfo;
string filepath;
filepath = “F:/abc.pqr”;
if (File.Exists(filepath))
{
//get version information
fversinfo = FileVersionInfo.GetVersionInfo(filepath);

//print file description
label1.Text = fversinfo.FileDescription;

//print full path to file
label2.Text = “fullpath : {0}” + fversinfo.FileName;
//print major.minor version info
label3.Text = “version : {0}.{1}” + fversinfo.FileMajorPart + fversinfo.FileMinorPart;

//cleanup
fversinfo = null;

//get general file info
finfo = new FileInfo(filepath);

//get file attributes
label4.Text = “attributes: {0}” + finfo.Attributes.ToString();

//get the size of the file
label5.Text = “file size : {0}k” + finfo.Length / 1024;

//get the last time the file was written to
label6.Text = “last write: {0}” + finfo.LastWriteTime.ToShortDateString();
//cleanup
finfo = null;
}
else
{
//MessageBox.Show(“File not found”);
label7.Text = “File not found”;
}*/

}

private void timer1_Tick(object sender, EventArgs e)
{
//Form Load code
//Step1: code to call step1
Guid HidGuid = new Guid();
HidD_GetHidGuid(ref HidGuid);
//End Step1: code to call step1

//Step2: code to call step2
const int DIGCF_PRESENT = 0×054C;
//const int DIGCF_DEVICEINTERFACE = (0×00000001);
deviceinfoset = SetupDiGetClassDevsA(ref HidGuid, 0, IntPtr.Zero, DIGCF_PRESENT);
//Display
label1.Text = “Device Info Set = ” + deviceinfoset.ToString();
label2.Text = “HidGuid = ” + HidGuid.ToString();
//End dispaly
//End Step2: code to call step2

//Step3: Identifying a Device Interface
MyDeviceInterfaceData.cbSize = 28;
MyDeviceInterfaceData.InterfaceClassGuid = System.Guid.Empty;
MyDeviceInterfaceData.FLAGS = 0;
MyDeviceInterfaceData.Reserved = 0;
MemberIndex = 0;
Result = SetupDiEnumDeviceInterfaces(deviceinfoset, 0, ref HidGuid, MemberIndex, ref MyDeviceInterfaceData);
//Display
label3.Text = “Result = ” + Result.ToString();
//End Display
//End Step3: Identifying a Device Interface

//Step4: requesting a structure containing the Device Path Name
Success = SetupDiGetDeviceInterfaceDetail(deviceinfoset, ref MyDeviceInterfaceData, IntPtr.Zero, 0, ref BufferSize, IntPtr.Zero);
//MessageBox.Show(“success = ” + Success.ToString());
IntPtr detailDataBuffer;
detailDataBuffer = Marshal.AllocHGlobal(BufferSize);
Marshal.WriteInt32(detailDataBuffer, 4 + Marshal.SystemDefaultCharSize);
Success = SetupDiGetDeviceInterfaceDetail(deviceinfoset, ref MyDeviceInterfaceData, detailDataBuffer, BufferSize, ref BufferSize, IntPtr.Zero);
//MessageBox.Show(“New success = ” + Success.ToString());
//Display
label4.Text = “New success = ” + Success.ToString();
//End Display
//End Step4: requesting a structure containing the Device Path Name

//step5: Extracting the Device Path Name
string Devicepathname;
IntPtr pDevicePathName;
pDevicePathName = new IntPtr(detailDataBuffer.ToInt32() + 4);
Devicepathname = Marshal.PtrToStringAuto(pDevicePathName);
Marshal.FreeHGlobal(detailDataBuffer);
//display
label5.Text = “path name = ” + pDevicePathName.ToString();
label6.Text = “device path name = ” + Devicepathname;
label7.Text = “File Exists = ” + File.Exists(Marshal.PtrToStringAuto(pDevicePathName)).ToString();
counter=counter + 1;
label8.Text = “Counter : ” + counter.ToString();
//MessageBox.Show(“path name = ” + pDevicePathName.ToString());
//MessageBox.Show(“device path name = ” + Devicepathname);
//End Display

//End step5: Extracting the Device Path Name
//End Form Load code

}

private void button1_Click(object sender, EventArgs e)
{
timer1.Stop();
button1.Enabled = false;
}
}
}