This implements the “Refresh Thumbnail” verb that adjust the modified time of the files it is invoked on by a small amount in order to invalidate cached information about the items including thumbnails that is based on the modification time.

This sample demonstrates:

• how to create a secondary verb that is registered on all file types in the system.
• verb implementation using a COM local server (.exe) using the “Drop Target” verb invoke method
• how to convert the data object representation of the items in shell items so you can program them.
• The use of the name space walker to flatten the folder structure of the input, allowing the verb to work the items in the selected folders
• This also contains a re-factoring of the standard helper routines that my samples use; creating a “Common” project that can be shared across other shell samples.

I hope to crate a blog post that walks through the details sample soon… let me know if you are interested.

Chris