StringCaseSense

On: String comparisons are case sensitive. This setting also makes the expression equal sign operator (=) and the case-insensitive mode of InStr() use the locale method described below.

Off: The letters A-Z are considered identical to their lowercase counterparts. This is the starting default for all scripts due to backward compatibility and performance (Locale is 1 to 8 times slower than Off depending on the nature of the strings being compared).

Locale [v1.0.43.03+]: String comparisons are case insensitive according to the rules of the current user's locale. For example, most English and Western European locales treat the letters A-Z and ANSI letters like Ä and Ü as identical to their lowercase counterparts. This setting applies to:

• Expression equal sign operator (=).
• InStr(): When its CaseSensitive parameter is omitted or false, it uses the locale method of insensitivity instead of the "A-Z only" method.
• All other commands, functions, and operators that are documented as obeying StringCaseSense.