>open toolbox,
>Right click in toolbox
>Select `Choose items...`
>Then rather then selecting from the list of stock items click on the `Browse...` command button.
>
>Find the dll of your tool.
>once you have found the dll click ok.
>Visual Studio will verify the type library etc...
>
>then
>Your custom tool is added to the toolbox.

Thanks, Dave. I added my controls to the Custom Controls tab I created (once I created a release version of the controls). However, for some reason I could not figure out how to add DevExpress controls. I found them in Windows\Assembly, but I can not add them from there.

I'm guessing, that they are Windows controls (not Web controls), that's why I can not add them to the Toolbox.