What is tab #13119 on my VS 2008 toolbox?

I only noticed this last night, as I have not used the toolbox on this particular project for some time. Suddenly, all my Telerik controls, previously on their own tab, were missing, and this mysterious, empty tab #13119 was there. I added a new tab for Telerik and added all the controls, but the Telerik tab remained invisible, although the controls are still ticked to indicate that they are in the toolbox.

From stackoverflow

• Maybe this helps: Toolbox Missing Controls

• It seems to be a bug.

  Citation from here:

  1. Make sure you can see all of the folders on your box. We are heading to the realm of hidden files: (Under Tools --> Folder Options)
  2. Close Visual Studio if it is open.
  3. Go Here: C:\Users\YOUR_USER_NAME\AppData\Local\Microsoft\VisualStudio\9.0\
  4. Backup the following files in a temp folder for saftey and delete the originals. (toolboxIndex_reset.tbd ,toolboxIndex.tbd ,toolbox_reset.tbd ,toolbox.tbd)
  5. Restart Visual Studio and the files will be recreated. It'll take a few seconds for the toolbox to repopulate.

  Benjol : You probably also need `Tools>Options>Windows Form Designer>AutoToolboxPopulate` set to true (which is the default value)

  Ant : The location of the files on XP is C:\Documents and Settings\USER_NAME\Local Settings\Application Data\Microsoft\VisualStudio\9.0

• I get this now and again. Try right clicking the Toolbox and select 'Reset Toolbox'

  romkyns : 'Reset Toolbox' doesn't help here.