Outlook 2007 add-in – What event occurs when an user moves an email from a folder to another one

You got it 76mel. I had the same problem (just hooking up a folder to the BeforeItemMove event made it so that when I moved a message out of that folder, I couldn't move it from the new folder to yet another folder for a small amount of time).

Adding Marshal.ReleaseComObject() to the end of the event handler fixed it perfectly.

The Html specification says that disabled fields should not be submitted therefore you can only use readonly in your situation, where you want to update the value from JS and submit it. readonly with a CSS class that makes it look disabled gives a better UI experience. Alternatively, just use a span plus hidden input.

See: http://www.w3.org/TR/html401/interact/forms.html#h-17.12.1

"Disabled controls cannot be successful." and "A successful control is "valid" for submission."