Windows Photo Screensaver Settings

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• 2010년 7월 1일 목요일 오후 11:23

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  Hi, jdpickering:

  That string seems to be encrypted in Base64, and it represents an item list, which is a shell structure that contains the path and other things. This is the reason why you may get different strings for the same paths.

  For example, to decrypt it, the first thing you should do is call the API CryptStringToBinary (http://msdn.microsoft.com/en-us/library/aa380285(VS.85).aspx) with the third parameter set to CRYPT_STRING_BASE64. This API will return a pointer to an item list (PIDL), so you would use the API ShCreateItemFromIDLIST (http://msdn.microsoft.com/en-us/library/bb762133(VS.85).aspx) to get a shell item for the path. Once you have the pointer to the shell item (say "pItem"), call pItem->GetDisplayName(...) to get the path.

  Here's more information about PIDL's: http://msdn.microsoft.com/en-us/library/cc144089(VS.85).aspx#ID_Lists_PIDL

  If you need more information, post your question to the MSDN forums: http://social.msdn.microsoft.com/Forums/en/categories/

  ---

  Microsoft MVP Windows Desktop Experience

  • 답변으로 표시됨 Arthur XieMicrosoft Contingent Staff, Moderator 2010년 7월 2일 금요일 오전 7:54
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• 2010년 10월 20일 수요일 오전 5:47

   

   
  

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  This is an excellent explanation of why the registry key is encrypted and the API calls required to de-crypt it but does anyone have sample code for either reading or writing this information?

  If this encrypted key truly does hold and encrypted version of the folder path for the screensaver picture location then exporting the registry key and importing it to another machine should set the folder location. Right?

  I can't see why that wouldn't work? But it doesn't!

  I set the folder location on my screensaver.
  Exited the customization screen.
  Exported the registry key in question.
  Changed the screensaver folder location to a new location. 
  Exited the customization screen.
  Imported the registry key.

  The settings were still the same and did not revert back to the setting I first set.

  What is worth noting is the speed and shuffle values DO change and ARE set.

  Is anyone else go an answer to this frustrating issue?

  and why can't Microsoft add this in to Group Policy by default?

  ---

  Brett Moffett

  • 편집됨 Moff25 2010년 10월 21일 목요일 오전 5:17
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• 2010년 10월 21일 목요일 오전 5:15

   

   
  

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  SOLUTION FOUND!

  When exporting the registry key and re-importing it I noticed that the Speed and Shuffle values were being set but not the PIDL value.

  If you look at the exported registry key it looks like this:

  [HKEY_CURRENT_USER\Software\Microsoft\Windows Photo Viewer\Slideshow\Screensaver]
  "Speed"=dword:00000001
  "Shuffle"=dword:00000001
  "EncryptedPIDL"="FAAfUOBP0CDqOmkQotgIACswMJ0ZAC9DOlwAAAAAAAAAAAAAAA
  AAAAAAAAAAUgAxAAAAAADdPGCXEABXaW5kb3dzADwACAAEAO++7jqFGt08YJcqAAA
  AWAcAAAAAAQAAAAAAAAAAAAAAAAAAAFcAaQBuAGQAbwB3AHMAAAAWAFwAMQA
  AAAAA3TxclxAAU1REUElDfjEAAEQACAAEAO++3Txcl908XJcqAAAA80MAAAAACgAAAAAA
  AAAAAAAAAAAAAFMAdABkAFAAaQBjAHQAdQByAGUAcwAAABgAAAA=
  "

  The problem is the .reg file seems to inject carriage return or paragraph mark items at a given distance in the PIDL string and when re-imported in to the registry it can't deal with it so does not import it.

  By removing the line breaks and representing the key as one VERY long string it can then import the value fine. For example:

  [HKEY_CURRENT_USER\Software\Microsoft\Windows Photo Viewer\Slideshow\Screensaver]
  "Speed"=dword:00000001
  "Shuffle"=dword:00000001
  "EncryptedPIDL"="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"

  Even on this page the value does not fit but if you do copy this to a .reg file you will be able to set the PhotoScreensaver value to Public Pictures.

  It is then possible to set this value via Group Policy Preferences or custom GPO to maintain a consistent approach throughout your organisation.

  Hope these notes help

  
  

  ---

  Brett Moffett

  • 답변으로 제안됨 Moff25 2010년 10월 21일 목요일 오전 5:16
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