Normally WebCatalog finds text regardless of its case, so "Joe" equals "JOE" equals "jOe". But sometimes you may find it important to search for words where case matters. To make a field case-sensitive, put "case=T" after the fieldname in the search URL (or as a hidden field in the search form).
If your database has a field called "FirstName," and you want to look for records containing "Grant" in the FirstName field, but not "GRANT," then you would enter a URL something like this:
The template "Results.tpl" will be displayed after the search, and any [FoundItems] contexts in it will be filled with found records. "Grant" will be considered a match, but "GRANT" will not.