A ? in a word matches any single character (including a Unicode character), and a * matches any number of characters.

The wildcard characters can be in any position in a word. For example: 

appl* would match apple, application, etc. 

*cipl* would match principle, participle, etc. 

appl? would match apply and apple but not apples. 

ap*ed would match applied, approved, etc. 

Use of the * wildcard character near the beginning of a word will slow searches somewhat. 

Another wildcard, the = wildcard in dtSearch Desktop, matches any digit (0-9). For example, === would match any three-digit number. This wildcard is disabled in the dtSearch Engine by default. To enable it, set Options.MatchDigitChar option setting to the character that you want to use as the wildcard.

Search Features