Server version: WI-T6.3.0.20343 Firebird 2.5 Alpha 1
I use UTF8 for database, default_charset for connection.
I use IB Expert for developing.

DECLARE EXTERNAL FUNCTION ZUDF_GUID_TO_CHAR
CHAR(16) CHARACTER SET OCTETS
RETURNS VARCHAR(64)
ENTRY_POINT 'zudf_guid_to_char' MODULE_NAME 'zudf.x86.dll';

I wrote my own GUID handling functions because I need to be compatible with
the Microsoft's GUID structure.
They based on the built-in UUID_TO_CHAR and CHAR_TO_UUID functions source
code.


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