Home Screen Thumbnails - where do they live???

[MattH_Work]

I am aware that the recently used list for Inventor is kept in the registry

HKEY_CURRENT_USER\Software\Autodesk\Inventor\RegistryVersion28.0\Recent File List

This list is used by the Home screen to show all recent files. Where does the thumbnail come from that the home screen displays

What mechanism does the home screen use to display the thumbnal without opening the file first. I can already view the thumbnail within Inventor (NOT apprentice) , but I have to open each file to read its iProps

It seems that when Inventor opens, a bunch of JPG's are created in the Temp folder ( %Temp% ) in a similar format too 7103.jpg, 7114.jpg, 7135.jpg. These are the thumbnails used on the home screen. They are removed when Inventor closes, therefore recreated from scratch (with different names) every time. Is there somewhere in the Registry I can query, or anything anywhere I can query to get the correct JPG associated to each entry in the Recent File List
It is quite computationally expensive to open a file just to read an iProperty, then close it again. Especially if there are many files in the Recent file List, and double especially (?) if they are big files.

[bradeneuropeArthur]

Does this help you further:

https://modthemachine.typepad.com/my_weblog/2010/06/accessing-thumbnail-images.html

[MattH_Work]

I'm already doing this...

I can get the thumbnail form ALL open documents using this method ( no real additional cost as the files are already in memory)

I want to get the thumbnail from all the Recent documents ( this list of files is easy to retrieve from the registry )
I DO NOT want to open each file to query its thumbnail ( as I currently have to do ) I would prefer to find out how Inventor does it 'quickly' for the home screen. Inventor seems to generate the thumbnail on the fly, put the resulting JPG into the %Temp% folder and then display it on the home screen

So the big question is, how do I get the thumbnail of a file that is NOT currently open, in a timely manner ( just as Inventor can do )

[Frederick_Law]

Thumbnail are saved in the part file.

IV probably pull it out and put it in temp folder.