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Imports System.IO imports System.Drawing Imports Microsoft.Win32 Namespace Tools Public Class ExtractFileIcon Private Declare Function ExtractIcon Lib "shell32.dll" Alias "ExtractIconA" (ByVal hIcon As IntPtr, ByVal lpszExeFileName As String, ByVal nIconIndex As Integer) As IntPtr Private Declare Function DestroyIcon Lib "user32" (ByVal hIcon As IntPtr) As Boolean Private hIcon As IntPtr = IntPtr.Zero Public Function GetIconFromFile(ByVal strFile As String) As Icon Dim myIcon As Icon Dim myFile As New FileInfo(strFile) Dim intIconIndex As Integer Dim strRegResult As String Dim str() As String If Not hIcon = IntPtr.Zero Then Try DestroyIcon(hIcon) Catch ex As Exception End Try End If Try ' If the file is an application, retrieve the icon from that file. If myFile.Extension.ToLower = ".exe" Then hIcon = ExtractIcon(IntPtr.Zero, myFile.FullName, 0) ' If no success then use windows default. If hIcon.ToInt32 <= 1 Then hIcon = ExtractIcon(IntPtr.Zero, "Shell32.dll", 0) Else ' Get location from registry. strRegResult = Registry.ClassesRoot.OpenSubKey(myFile.Extension).GetValue("").ToString strRegResult = Registry.ClassesRoot.OpenSubKey(strRegResult).OpenSubKey("DefaultIcon").GetValue("").ToString str = strRegResult.Split(","c) If str.Length > 1 Then intIconIndex = CType(str(1), Integer) Else intIconIndex = 0 End If strRegResult = str(0) hIcon = ExtractIcon(IntPtr.Zero, strRegResult, intIconIndex) End If myIcon = Icon.FromHandle(hIcon) Catch hIcon = ExtractIcon(IntPtr.Zero, "Shell32.dll", 0) myIcon = Icon.FromHandle(hIcon) End Try Return myIcon End Function Protected Overrides Sub Finalize() If Not hIcon = IntPtr.Zero Then Try DestroyIcon(hIcon) Catch ex As Exception End Try End If MyBase.Finalize() End Sub End Class End Namespace |