using

System;

using

System.Collections.Generic;

using

System.Drawing;

using

System.Windows.Forms;

using

System.Runtime.InteropServices;

using

System.IO;

namespace

ShowIcon

{

[StructLayout( LayoutKind.Sequential)]

public

struct

FileInfomation

{

public

IntPtr hIcon;

public

int

iIcon;

public

int

dwAttributes;

[ MarshalAs( UnmanagedType.ByValTStr, SizeConst

=

260

)]

public

string

szDisplayName;

[ MarshalAs( UnmanagedType.ByValTStr, SizeConst

=

80

)]

public

string

szTypeName;

}

///

<summary>

///

Description of MainForm.

///

</summary>

public

partial

class

MainForm

{

[STAThread]

public

static

void

Main(

string

[] args)

{

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(

false

);

Application.Run(

new

MainForm());

}

[DllImport(

"

shell32.dll

"

, EntryPoint

=

"

SHGetFileInfo

"

)]

public

static

extern

int

GetFileInfo(

string

pszPath,

int

dwFileAttributes,

ref

FileInfomation psfi,

int

cbFileInfo,

int

uFlags);

public

MainForm()

{

//

//

The InitializeComponent() call is required for Windows Forms designer support.

//

InitializeComponent();

//

//

TODO: Add constructor code after the InitializeComponent() call.

//

}

public

static

Icon GetSmallIcon(

string

path)

{

FileInfomation _info

=

new

FileInfomation();

GetFileInfo(path,

0

,

ref

_info, Marshal.SizeOf(_info), (

int

)(

0x000000100

|

0x000000001

));

try

{

return

Icon.FromHandle(_info.hIcon);

}

catch

{

return

null

;

}

}

void

Button1Click(

object

sender, System.EventArgs e)

{

this

.openFileDialog1.ShowDialog();

}

void

OpenFileDialog1FileOk(

object

sender, System.ComponentModel.CancelEventArgs e)

{

this

.textBox1.Text

=

this

.openFileDialog1.FileName;

this

.pictureBox1.Image

=

GetSmallIcon(

this

.openFileDialog1.FileName).ToBitmap();

}

}

}