How come nobody ever reads the Help-files before asking a question here?

Type in something like Dim Q as String, put your cursor on the "String" keyword and hit F1. The select "String Data Type". This is what the helpfiles will tel you:

There are two kinds of strings: variable-length and fixed-length strings.

A variable-length string can contain up to approximately 2 billion (2^31) characters.


A fixed-length string can contain 1 to approximately 64K (2^16) characters.
Note APublic fixed-length string can't be used in a class module.

The codes for String characters range from 0–255. The first 128 characters (0–127) of the character set correspond to the letters and symbols on a standard U.S. keyboard. These first 128 characters are the same as those defined by theASCII character set. The second 128 characters (128–255) represent special characters, such as letters in international alphabets, accents, currency symbols, and fractions. The type-declaration character for String is the dollar sign ($).