Hi

Thank you for your fast reaction

>If blob is defined as "sub_type text" and updated with base64 converted string, is OK. This is what I've done and I hadn't any troubles since then. The drawback is that the string needs to be converted back after fetch.

This works great. Thank you !

It's a trick but in fact i used the same one with MS SQL server 2000 (using the server TEXT type instead of a more adequate binary datatype).

>If you want to talk directly with the driver coders, you can reach them at news.atkin.com , newsgoup "firebird_odbc_devel".

I'll post a message over there. The problem is that i do not really known what odbc base functions are at stake when moving a blob back to firebird.
i have very limited understanding of the ODBC API. Will try anyway.

François