Enter a search string into the form field, and ht://Dig should go to work processing your search request. Here's what the result looks like:

Needless to say, you can customize this output, and even the manner in which the search is carried out. If, for example, you tell ht://Dig to display the results in "short" rather than "long" format, you'll see something like this:

You can also perform a Boolean search, simply by selecting "Boolean" from the drop-down list: