Hi Flomo,

Based on my understanding, you asked two questions:

1. How to change the folder type of a folder programmatically
2. How to change a folder's icon programmatically

For your first question, there's no documented or supported way to do this
using code. Sorry for the inconvenience.

For your second question, we can achieve the objective using desktop.ini:

#Customizing Folders with Desktop.ini
http://msdn2.microsoft.com/en-us/library/bb776832.aspx

Here's an example in C#:

#Create Icons for Folders in Windows Explorer, Using C# - The Code Project
- Files and Folders
http://www.codeproject.com/cs/files/foldericonsincsharp.asp?df=100&forumid=1
45059&exp=0&select=1555092

Hope this helps.

Regards,
Walter Wang (wawang@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

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