FreeTDS Development Group

["Coleman, Dave" <DColeman AT US.TIAuto.com>]

Does this necessarily need to be an ODBC driver?  I would think that you
could define entry/exit points to the freetds.dll, register them, then use
VC++ to create a custom ODBC driver which would contain Driver Manager
hooks.  This driver could import functions from freetds.dll if this file is
properly registered as a system component.  I'm not an expert on these
matters, although; even if this might need an interface level or two, I
don't think that the Win32 architecture would prevent it from being
implemented.

Keep in mind, ODBC is close and dear to Microsoft's heart.  When you talk
about manually tapping into ODBC, you need to consider the fact that
Microsoft does not want just anybody to do this.  A correctly written,
mallicious ODBC driver can be very destructive if it wants to be.

I think the key to setting freetds.dll up as a ODBC driver is to hide
freetds.dll from the operating system.  I can't think of the type of
component you want to create, but I know you can "pass through" to/from
freetds.dll to the Driver manager via a "standard" MS-supported API (if you
provide registered entry/exit points to freetds.dll in the code and register
them with regsvr32...)

I'm sorry I don't know more specifics.  Hopefully someone with more nuts and
bolts Win32 knowledge will see this and fill in my blanks...

D

> -----Original Message-----
> From: Frank M. Kromann [SMTP:frank AT kromann.info]
> Sent: Wednesday, February 05, 2003 2:48 PM
> To:   freetds AT lists.ibiblio.org
> Subject:      RE: [freetds] freetds in win32
> 
> Hi,
> 
> To the best of my knowledge this can not be used for ODBC drivers.
> 
> ODBC drivers need to talk to the Driver Manager to install a new driver.
> This will create the entries needed in the regestry and it will allow the
> driver manager to create DSN's for the driver.
> 
> I have not been able to compile the FreeTDS stuff on Win32 (only tested
> with 0.60-snapshots). As soon as I get the time I'll have a look at it and
> perhaps add the functions needed to do the installation. I've done this
> for FrontBase last year.
> 
> - Frank
> 
> > The program to install a COM, COM+, OCX, DLL or other external system
> > component is called "regsvr32.exe" and is usually located in
> > c:\winnt\system32\.  You may need to have "developer" files installed
> to
> > have this on some systems...
> > 
> > This executable should be packaged as part of Visual Studio, however; it
> may
> > be a standard piece of most Win32 distributions.  I do not know for
> sure.
> > 
> > just search for RegSvr32.exe in the MSDN collection.  These ought to get
> you
> > going:
> > 
> >
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/indexsrv/
> ht
> > ml/ixufilt_9v1v.asp
> > 
> >
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/security/
> se
> > curity/registering_the_new_functionality.asp
> > 
> >
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/oledb/htm
> /o
> > ledbpwk_noospreg.asp
> > 
> > Good luck,
> > Dave
> > 
> > 
> > > -----Original Message-----
> > > From:     Frediano Ziglio [SMTP:freddyz77 AT tin.it]
> > > Sent:     Wednesday, February 05, 2003 8:18 AM
> > > To:       FreeTDS
> > > Subject:  RE: [freetds] freetds in win32
> > > 
> > > Il mer, 2003-02-05 alle 09:24, Gad Hayisraeli ha scritto:
> > > > in windows , you cannot use you driver manager, but windows driver
> > > manager (odbc data sources in control panel) , and
> > > > your driver must have some dll exports in order to be compatible to
> the
> > > driver manager.
> > > > the FreeTDS.dll has not have all these , so how can i use it as an
> odbc
> > > driver in windows ?
> > > > 
> > > > or if you have an alternative way , please state it
> > > > 
> > > 
> > > I don't know who you compile odbc driver but with project compile and
> > > export symbols. Exports are done with .def file, so if you do not use
> > > .def file dll do not export anything...
> > > 
> > > Perhaps problem is installing the driver... There isn't an install or
> a
> > > dll for setting properties so you have to add some registry entry
> > > manually.
> > > 
> > > freddy77
> > > 
> > > 
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> > 
> 
> 
> 
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