Hi List,

I'm currently building C/C++ application that requires external blob filter.

I use the skeleton filter snippets (from the manuals) as the outline,
and i understand that in order to pump blob to database (action = put segment)
or to retrieve blob to my application (action = get segment), my filter must
eventually invoke the internal filter access routine, i.e isc_blob_ctl's
(*ctl_source)().

But i'm stuck. My app can only writes the blob id (not the binary blob itself)
and does even worse on reading the binary... :(

Can anybody help me give detailed steps on doing so? especially on how to
invoke the internal filter access routine or ISC_BLOB_CTL?

thanks