>I recall that Christof Wollenhaupt once wrote me an algorithm of parsing (?) save memvar / restore from memvar. Today I saw a similar question and was trying to find this thread, but so far all my attempts were fruitless. I'm wondering, is it possible to search only by From/To members without specifying a search string?

The search with key words require a key word. An alternative to search without entering the key word is the calendar but that is only on a monthly basis.