use ODBC.NET
http://msdn.microsoft.com/downloads/default.asp?url=/downloads/sample.asp?url=/msdn-files/027/001/668/msdncompositedoc.xml
http://msdn.microsoft.com/downloads/default.asp?url=/downloads/sample.asp?url=/msdn-files/027/001/668/msdncompositedoc.xml
http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q318559
HKEY_LOCAL_MACHINE\\SoftWare\\ODBC\\ODBCINST.INI下面的具体项。