EscapeChar

EscapeChar = c :  Sets the character used to suppress the normal meaning 
of the following character.  The default is a caret [^]. See Escape 
Character for a description of special escape sequences.  You cannot use 
any of the redirection characters (|, >, or < ) or the whitespace 
characters (space, tab, comma, or equal sign) as the escape character. 
 The escape character is saved by SETLOCAL and restored by ENDLOCAL. 

Also see SETDOS /E, the %= internal variable, and Special Character 
Compatibility for information on using compatible escape characters for 
two or more products.