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Sunday, September 28, 2008

Reading Shortcuts with PowerShell and VBS

This post provides a simple method of enumerating shortcuts and retrieving their properties, either using PowerShell or VBScript. There is nothing particularly clever here, but I had a need a while back to use the enumeration, and I wrote the simple powershell equivalent to see how easy it would be. Note that I couldn't easily see a managed code .Net method to process shortcuts, so I fell back on the wscript COM object. More than likely there is a better method (get it? :) than this.

Run the scripts:


powershell . .\ReadShortcut.ps1 -p \\%server%\%share%\folder\path
powershell . .\ReadShortcut.ps1 -f \\%server%\%share%\shortcut.lnk
cscript //nologo "ReadShortcut.vbs" \\%server%\%share%\folder\path
cscript //nologo "ReadShortcut.vbs" \\%server%\%share%\shortcut.lnk

#
param(
   [string] $path = "",
   [string] $file = ""
   )

$WshShell = new-object -comobject "WScript.Shell"       # Instantiate the wscript.shell COM object

if ($path -ne "") {
    $shortcuts = get-childitem -path $path -filter "*.lnk" -rec    # Find all .lnk files, recursing in to subdirectories
    $shortcuts | foreach-object {$WshShell.CreateShortcut($_.FullName) }  # For each file, pass the fullname to the COM object to open the shortcut and enumerate the properties
} elseif ($file -ne "") {
    $shortcut = get-item -path $file       # Get the single file
    if ($shortcut -ne $null) { $WshShell.CreateShortcut($shortcut) }   # If exists, read the shortcut properties
} else {
    write-output "No arguments specified, please use either -p to specify a path or -f for a specific .lnk file"
}

#-------#


'ReadShortcut.vbs
' Read a shortcut or a top-level directory of shortcuts and write the properties to stdout
If WScript.Arguments.UnNamed.Count = 1 Then
 strShortcut = WScript.Arguments.UnNamed(0)
Else
 WScript.Echo "Please supply the name of an lnk file or directory to read, eg c:\test.lnk or c:\shortcuts"
 WScript.Quit(1)
End If

Set objFSO = CreateObject("Scripting.FileSystemObject")

If objFSO.FolderExists(strShortCut) Then      ' Was a directory specified?
 Set objFolder = objFSO.getFolder(strShortcut)     ' Get the folder
 
 For Each objfile in objFolder.Files      ' For each file in the top-level directory
  If objfile.type = "Shortcut" Then     ' Is this file a shortcut?
   Call Readshortcut(objFile.Path, strProperties)   ' yes, read the properties
   dtmCreationDate = objFile.DateCreated
   WScript.Echo dtmCreationDate & "," & strProperties  ' output the results
  End If 
 Next
ElseIf objFSO.FileExists(strShortCut) Then      ' Was an individual file specified?
 Call Readshortcut(strShortcut, strProperties)     ' read the properties of the file
 WScript.Echo strProperties       ' output the results
Else           ' file-not-found
 WScript.Echo "Error: Could not read '" & strShortcut & "'"
 WScript.Quit(2)
End If
Set objFSO = Nothing

Function Readshortcut(ByRef strShortcut, ByRef strProperties)

 set objWshShell = WScript.CreateObject("WScript.Shell")    ' Create the shell object
 set objShellLink = objWshShell.CreateShortcut(strShortcut)   ' Execute the createshortcut method, which also retrieves an existing shortcut
 strProperties = strShortCut & "," & objShellLink.TargetPath & "," & objShellLink.WindowStyle & "," & objShellLink.Hotkey & "," & objShellLink.IconLocation & "," & objShellLink.Description & "," & objShellLink.Arguments & "," & objShellLink.FullName & "," & objShellLink.WorkingDirectory & """"

 ' This propertly can be set, but not read? - objShellLink.RelativePath
 Set objShellLink = Nothing
 Set objWshshell = Nothing
End Function

Wayne's World of IT (WWoIT), Copyright 2008 Wayne Martin.

4 comments:

Anonymous said...

Hi,

Your script was very valuable to me. Thank you.

M.G.

Thaddaeus said...

Excelent help Thanks

Ryan Barber said...

This script is great for reading the properties of a shortcut, however, I can't seem to be able to retrieve the value into a string for comparison. ie: strTargetPath = objShellLink.TargetPath

I'm off base here I'm sure, but I need to retrieve the value in TargetPath for comparing to another string. If TargetPath = "x" then delete the shortcut ie: If objShellLink.TargetPath = "x" Then

Is this possible?

Nasar Mahmood said...

Hi,

Not sure if this would help me or not, I have lots of shortcuts to webpages in one folder, and i need a script that will read the shortcut target link to the webpage, and write that to a textfile.

would this be able to help me in this problem.

Thanks in advance.


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About Me

I’ve worked in IT for over 13 years, and I know just about enough to realise that I don’t know very much.