When eValid is used in this role, the main additional ingredient is the description of the pattern that indicates when the specified threat is present. The patern are usually expressed as regular expressions (REs).
Your searches with eValid DOM search commands like
IndexFindElementEx will need this pattern so that your script will know what to search for. That command takes a RE as an argument.
If you are scanning a site with the built-in website scanner (spider) then you'll want to feed that RE into the Page Filter.
An excellent resource for you to use the OWASP produced
Security Cheat Sheet. That collection shows you the REs for not only SQL-Injection but a wide variety of other types of vulnerabilities.
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