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question to api-gurus - SHFILEINFO

 
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bornsoft
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Joined: 19 Feb 2009
Posts: 113
Location: Germany

PostPosted: Thu Oct 29, 2009 3:39 am    Post subject: question to api-gurus - SHFILEINFO Reply with quote

hello,

i need to list associated icons to files in a bitlist. i tried the registry-way, but this not always works.

on my research i stumbled over SHFILEINFO in shell32.dll which ist used by the explorer to show associated icons.
i found the following code in VisualBasic and wonder if it's possible to make this work in vds.
i've no idea how to start and - if i'm not wrong - this will return just a handle to the icon, so what next?

Code:


Private Const SHGFI_ATTRIBUTES  As Long = &H800
Private Const SHGFI_DISPLAYNAME As Long = &H200
Private Const SHGFI_EXETYPE As Long = &H2000
Private Const SHGFI_ICON As Long = &H100
Private Const SHGFI_ICONLOCATION As Long = &H1000
Private Const SHGFI_LARGEICON As Long = &H0
Private Const SHGFI_LINKOVERLAY As Long = 32768 '= &H8000
Private Const SHGFI_OPENICON As Long = &H2
Private Const SHGFI_PIDL As Long = &H8
Private Const SHGFI_SELECTED As Long = &H10000
Private Const SHGFI_SHELLICONSIZE As Long = &H4
Private Const SHGFI_SMALLICON As Long = &H1
Private Const SHGFI_SYSICONINDEX As Long = &H4000
Private Const SHGFI_TYPENAME As Long = &H400
Private Const SHGFI_USEFILEATTRIBUTES As Long = &H10
Private Const MAX_PATH = 260

Private Type SHFILEINFO
  hicon As Long
  iIcon As Long
  dwAttributes As Long
  szDisplayName As String * MAX_PATH
  szTypeName As String * 80
End Type

Private Declare Function SHGetFileInfo Lib "shell32.dll" _
 Alias "SHGetFileInfoA" (ByVal pszPath As String, _
 ByVal dwFileAttributes As Long, psfi As SHFILEINFO, _
 ByVal cbFileInfo As Long, ByVal uFlags As Long) As Long

...

Public Function GetDisplayedIcon( _
 ByRef strFilename As String, _
 Optional ByVal lngFlags As shgfiFlags = shgfiLarge) _
 As StdPicture

  Dim fi As SHFILEINFO
  Dim lngReturn As Long
 
  lngFlags = lngFlags Or SHGFI_ICON
  lngReturn = SHGetFileInfo(strFilename, 0, fi, Len(fi), lngFlags)
  If lngReturn = 0 Then
    Err.Raise 5
  End If
  Set GetDisplayedIcon = _
   PictureFromHandle(fi.hicon, vbPicTypeIcon, True)
End Function




the whole text i found is here: http://www.aboutvb.de/khw/artikel/khwassocicon.htm

(it's in german, but something similar in english should be found easily)

greetings

marcus
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Aslan
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Joined: 31 May 2001
Posts: 589
Location: Memphis, TN USA

PostPosted: Fri Oct 30, 2009 2:26 am    Post subject: Reply with quote

You might try having a look at Garrett's Icon Commander source.
http://www.vdsworld.com/search.php?view_mode=fileinfo&file_id=503&sid=edffc70c6130017ff935341a9e4e82ca
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DaveR
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Joined: 03 Sep 2005
Posts: 412
Location: Australia

PostPosted: Fri Oct 30, 2009 9:47 am    Post subject: Reply with quote

That URL won't work. But this works: http://www.vdsworld.com/search.php?view_mode=fileinfo&file_id=503
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Dave
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SnarlingSheep
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Joined: 13 Mar 2001
Posts: 759
Location: Michigan

PostPosted: Fri Oct 30, 2009 1:02 pm    Post subject: Reply with quote

You can get the handle to a files associated icon fairly easily, but you are correct, what next?
Code:
  %p = C:\boot.ini
  %a = 0
 
  %%hInst = @lib(kernel32,GetModuleHandleA,INT:,NIL:)
 
  %%ret = @lib(shell32,ExtractAssociatedIconA,INT:,%%hInst,INT:@addr("%p"),INT:@addr("%a"))
  info Icon Handle: %%ret
  exit

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