remoteapptool/remoteapp-tool/IconModule.vb

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2019-09-29 12:45:23 +00:00
Imports System.IO
Imports System.Drawing
Imports System.Collections.Generic
Public Class IconExtractor
Private Declare Function ExtractIconEx _
Lib "shell32.dll" Alias "ExtractIconExA" _
(ByVal lpszFile As String, ByVal nIconIndex As Int32, _
ByRef phiconLarge As Int32, ByRef phiconSmall As Int32, _
ByVal nIcons As Int32) As Int32
Private Declare Function ExtractIcon _
Lib "shell32.dll" Alias "ExtractIconA" _
(ByVal hInst As IntPtr, ByVal lpszExeFileName As String, _
ByVal nIconIndex As Int32) As Int32
Private Declare Function DrawIconEx _
Lib "user32" _
(ByVal hdc As Int32, ByVal xLeft As Int32, ByVal yTop As Int32, _
ByVal hIcon As IntPtr, ByVal cxWidth As Int32, ByVal cyWidth As Int32, _
ByVal istepIfAniCur As Int32, ByVal hbrFlickerFreeDraw As Int32, _
ByVal diFlags As Int32) As Int32
Private Declare Function DestroyIcon _
Lib "user32" _
(ByVal hIcon As Int32) As Int32
Private m_hIcons() As Int32
Protected Overrides Sub Finalize()
MyBase.Finalize()
Dim countIcons As Integer = m_hIcons.Length
If countIcons > 0 Then
For iconIndex As Integer = 0 To countIcons - 1
DestroyIcon(m_hIcons(iconIndex))
Next iconIndex
End If
End Sub
Public Function ExtractIcons(ByVal filePath As String, ByVal hInst As IntPtr) As List(Of Icon)
Dim listIcons As New List(Of Icon)
Try
Dim numIcons As Integer = ExtractIconEx(filePath, -1, 0&, 0&, 0&)
If numIcons = 0 Then
Throw New Exception("No icons found in " & filePath)
End If
numIcons -= 1
For currentIcon As Integer = 0 To numIcons
m_hIcons(currentIcon) = ExtractIcon(hInst, filePath, currentIcon)
Dim handleIcon As New IntPtr(m_hIcons(currentIcon))
If Not handleIcon.Equals(IntPtr.Zero) Then
listIcons.Add(Icon.FromHandle(handleIcon))
End If
Next currentIcon
Catch ex As Exception
MessageBox.Show(ex.ToString())
End Try
Return listIcons
End Function
End Class
Module IconModule
Public Sub TestIconLib()
Dim testIcon As New IconLib.MultiIcon
End Sub
Public Function IconFromFilePath(filePath As String) As Icon
Dim result As Icon = Nothing
Try
result = Icon.ExtractAssociatedIcon(filePath)
Catch
End Try
Return result
End Function
Public Function ExtractToIco(IconSourcePath As String, IconSourceIndex As Integer, IcoDestPath As String) As Boolean
Dim success = False
Dim IconLoadError As Boolean = False
If My.Computer.FileSystem.FileExists(IconSourcePath) = True Then
Dim mIcon As New IconLib.MultiIcon
Try
mIcon.Load(IconSourcePath)
Catch Ex As Exception
IconLoadError = True
End Try
If Not IconLoadError Then
Dim sIcon As IconLib.SingleIcon
If IconSourceIndex = 0 Then
sIcon = mIcon.FirstOrDefault
Else
sIcon = mIcon.Item(IconSourceIndex)
End If
Try
sIcon.Save(IcoDestPath)
success = True
Catch Ex As Exception
End Try
End If
End If
Return success
End Function
Declare Function ExtractIcon Lib "shell32.dll" Alias "ExtractIconExA" (ByVal lpszFile As String, ByVal nIconIndex As Integer, ByRef phiconLarge As Integer, ByRef phiconSmall As Integer, ByVal nIcons As Integer) As Integer
Public Function ReturnIcon(ByVal Path As String, ByVal Index As Integer, Optional ByVal small As Boolean = False) As Icon
Dim bigIcon As Integer
Dim smallIcon As Integer
ExtractIcon(Path, Index, bigIcon, smallIcon, 1)
If bigIcon = 0 Then
ExtractIcon(Path, 0, bigIcon, smallIcon, 1)
End If
If bigIcon <> 0 Then
If small = False Then
Return Icon.FromHandle(bigIcon)
Else
Return Icon.FromHandle(smallIcon)
End If
Else
Return ReturnIcon(GetSysDir() & "\user32.dll", 0)
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End If
End Function
End Module