Delphi 2009: String, UnicodeString oder WideString?

[daywalker9]

[edit] About String Types
A string represents a sequence of characters. Delphi supports the following predefined string types.

String types

Type Maximum length Memory required Used for
ShortString
255 characters
2 to 256 bytes
Backward compatibility

AnsiString
~2^31 characters
4 bytes to 2GB
8-bit (ANSI) characters, DBCS ANSI, MBCS ANSI, Unicode characters, etc.

UnicodeString
~2^30 characters
4 bytes to 2GB
Unicode characters, 8-bit (ANSI) characters, multi-user servers and multi-language applications

WideString
~2^30 characters
4 bytes to 2GB
Unicode characters; multi-user servers and multi-language applications. UnicodeString is generally preferred to WideString, except for COM applications.