Can I add a Preferences / Commands search to a toolbar?

Is it possible to add a Preferences and Commands search box to a toolbar?
This would be the same type of search that appears in the Directory Opus Preferences and Customize Toolbars windows.

Preferences needs to be open in order to search it.

The search field is given focus when Preferences first opens, so if you want to search Preferences, just open it and start typing.