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Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
Informix® OLE DB Provider Guide
The Informix® OLE DB Provider Programmer's Guide describes the software requirements for using Informix OLE DB Provider, show how to install and configure the provider for your use, and explain how to use Informix OLE DB Provider to enable client applications, such as ActiveX Data Object (ADO) applications and web pages, to access data on the Informix server.
Transaction support
Distributed transactions
A transaction coordinator ensures that the distributed system maintains a consistent state. The transaction coordinator that Informix® OLE DB Provider supports for distributed transactions is MS DTC (Microsoft™ Distributed Transaction Coordinator).

Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
- Change Data Capture API Programmer's Guide
  The Informix® Change Data Capture API Programmer's Guide describes how to program applications to process changed data from HCL Informix databases using the Informix Change Data Capture API.
- Embedded SQLJ for HCL Informix®
  The Informix® Embedded SQLJ User's Guide contains information about using Informix Embedded SQLJ.
- ESQL/C Guide
  The Informix® ESQL/C Programmer's Manual explains how to use Informix ESQL/C, the Informix implementation of Embedded Structured Query Language (SQL) for C (ESQL/C), to create client applications with database-management capabilities.
- GLS User's Guide
  The Informix® GLS User's Guide describes the Global Language Support (GLS) feature available in Informix products.
- API
  The Informix® GLS API Programmer's Guide describes the global language support (GLS) application programming interface (API) available in Informix ESQL/C and HCL Informix DataBlade® modules.
- Informix® Object Interface for C++ Guide
  The Informix® Object Interface for C++ Programmer's Guide describes how to develop HCL Informix client applications by using the object-oriented C++ programming language.
- Informix® ODBC Driver Guide
  The Informix® ODBC Driver Programmer's Manual serves as a user guide and reference for Informix ODBC Driver, which is the Informix implementation of the Microsoft™ Open Database Connectivity (ODBC) interface, Version 3.0.
- .NET provider options
  The Data Server Provider for .NET DB2® provider option is the preferred Informix® provider for developing new applications.
- Informix® JDBC Driver Guide
  The Informix® JDBC Driver Programmer's Guide describes how to install, load, and use Informix JDBC Driver to connect to the Informix database from within a Java™ application or applet.
- Informix International Language Supplement (ILS) User Guide
  These topics include information about the translated user interface files for Informix® UNIX™ products, locales, and code set conversion tables
- Informix® OLE DB Provider Guide
  The Informix® OLE DB Provider Programmer's Guide describes the software requirements for using Informix OLE DB Provider, show how to install and configure the provider for your use, and explain how to use Informix OLE DB Provider to enable client applications, such as ActiveX Data Object (ADO) applications and web pages, to access data on the Informix server.
  - Overview and setup
  - Supported applications
    With the Informix® OLE DB Provider, you can create the ADO, C, and C++ applications.
  - Connect to a data source
    Informix® OLE DB Provider treats the database (rather than the database server instance) as a data source.
  - Cursors
  - Data types
  - Threading support
  - Transaction support
    - Distributed transactions
      A transaction coordinator ensures that the distributed system maintains a consistent state. The transaction coordinator that Informix® OLE DB Provider supports for distributed transactions is MS DTC (Microsoft™ Distributed Transaction Coordinator).
    - Local transactions
      For local transactions, the default value of the Autocommit isolation level is read-committed for databases created with logging and read-uncommitted for databases created without logging.
  - Distributed transaction support
    Informix® OLE DB Provider supports distributed transactions coordinated by MS DTC.
  - Identifiers
  - Support for Dynamic Query Extension
    The Dynamic Query Extension feature introduces support for describing input parameters of a prepared statement. This feature is an enhancement of the Dynamic SQL functionality of the server.
  - Support for SQL 99 Joins
    The SQL 99 Joins feature extends support for SQL joins from both within and outside of an escape sequence. This feature requires HCL Informix® server-side support for SQL 99 joins, and only works with HCL Informix Version 9.4 or later.
  - International GLS Locales
    This section offers information and tips about using Informix® OLE DB Provider with Global Language Support (GLS) locales other than the default locale, en_us.1252.
  - Troubleshooting installation, configuration, or operation problems
    This section describes how to resolve problems that you might encounter when installing, configuring, or using Informix® OLE DB Provider.

Distributed transactions

A transaction coordinator ensures that the distributed system maintains a consistent state. The transaction coordinator that Informix® OLE DB Provider supports for distributed transactions is MS DTC (Microsoft™ Distributed Transaction Coordinator).