Allows for the substitution character to be defined on a character set by character set basis. The substitution character is the character placed in the output when a Unicode character does not exist in the target encoding. For readability's sake and to avoid character conversion problems when moving INI files between platforms, specify the substitution character as a hexadecimal string.
where XX is the complete hexadecimal representation of the substitution character and EncodingName is a valid encoding name. Additionally, you can use the encoding name Default to specify the substitution character for all the encodings not explicitly listed. A default substitution character is used whenever no substitution character is explicitly or implicitly specified in the Default settings.