Insert unformated data with SQL into Database

Hi,
I’m working on a small thing where I have to save an encrypted string in a Database.
I’m using an Access database at the moment, but want to be able to change database engine later if necessary.

(What I'm trying to do is to break down a structure and save it in a database instead of on file as we do it today.)

The actual problem:
I can successfully store all data extracted from the structure in my database except for the encrypted string below.

/********* Encrypted String ***********/

ã‚[Á‚T
ú             0  ÿÐ 0  ÿÐ  ÿÐ 0 0 0 0ÿÐÿÐÿеkã+‰!TZ8½1ùcÐŐ$Þq¿¬žkÌ¿(¯Rõ<•&>kI
Ž—cÞz43¡[îùVœdqýHcáÙH@öK@Ô±ËÔJ•Ô†¹ó«¾í'Æã—;¦o+׎$’“ô3AÇ ,Š±h(!ŸW4˜6~;%¦>׆7”Õí6 ìNMÙiÍÆÚºæÔÑMj +‰=ÌV]8„1ed¯ÅµPØ؁¼]eé<)óÜVu@”V>oH
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/**********************************************/

The problem is that when I try to store the encrypted data, I only succeed to save the first 11 characters for some reason.
(The field in the database is set as PM to be able to take anything very long.)

The encrypted data is stored in a structure that looks like this:
typedef struct bioapi_hrs_bir
{
      BioAPI_BIR_HEADER  Header;
      BioAPI_BIR_BIOMETRIC_DATA_PTR BiometricData; /* length indicated in */
                                                                           /* header                    */
      BioAPI_DATA_PTR Signature;      /* NULL if no signature; length is inherent */
                                            /* in this type                                            */
} BioAPI_BIR, *BioAPI_BIR_PTR;

The encrypted biometric string is stored in pBIR->BiometricData (in my code)

If I save the whole structure into a file with fwrite it works, but when I want to create a string in SQL to save the same information in my database it doesnt.
(I would guess that it has to do with sprintf that stops at the next NULL.)

I create the string with sprintf (I know that sprintf stops at the next NULL, but I have also tryed to override this by specifying the precision)
sprintf(strSqlQuery,"INSERT INTO fingerprint(fID, fBIR, fhLength, fhType, fhfFormatId, fhfFormatOwner, fhQuality, fhPurpose, fhFactorsMask, fsLength, fsData) VALUES('%s', '%s', %d, %d, %d, %d, %d, %d, %d, %d, '%s')",strName, pBir->Biostring, pBIR->Header.Length, pBIR->Header.Type, pBIR->Header.Format.FormatID, pBIR->Header.Format.FormatOwner, pBIR->Header.Quality, pBIR->Header.PurposeMask, pBIR->Header.FactorsMask, 0, "");

If i print the result of the abowe, it looks like this:
INSERT INTO fingerprint(fID, fBIR, fhLength, fhType, fhfFormatId, fhfFormatOwner, fhQuality, fhPurpose, fhFactorsMask, fsLength, fsData) VALUES('Tomas Nilsson4', 'ã‚[Á‚T
', 879, 4, 1, 11, 91, 1, 8, 0, '')

Anyway, the problem is (as I wrote before) that only the first 11 characters gets stored in the database (ã‚ [Á‚ T  ú)
Is there any way to do this without binding my self to a specific database?
I solved this problem before in VB by using ADO instead of writing the whole sql string, but I can’t bind towards Access this time.

Does anyone have any ideas?
( I understand if you don't understand what I'm trying to explain, but just post me and I'll try to do it better ;-)  )

Thanks in advance!

Kind Regards, Tomas