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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® 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.
Configure data sources
These topics explain how to configure a data source (DSN) on UNIX™ and Windows™ for Informix® ODBC Driver.
Configure a DSN on UNIX™
The configuration files provide information, such as driver attributes, that the driver uses to connect to DSNs.

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.
  - Overview of HCL Informix® ODBC Driver
    These topics introduce the Informix® ODBC Driver and describe its advantages and architecture. The topics also describe conformance, isolation and lock levels, libraries, and environment variables.
  - Configure data sources
    These topics explain how to configure a data source (DSN) on UNIX™ and Windows™ for Informix® ODBC Driver.
    - Configure a DSN on UNIX™
      The configuration files provide information, such as driver attributes, that the driver uses to connect to DSNs.
      - The odbcinst.ini file
        The odbcinst.ini file has entries for all the installed drivers on your computer.
      - The odbc.ini file
        The odbc.ini file is a sample data-source configuration information file.
      - ODBC section
        The values in the ODBC section of odbc.ini specify ODBC tracing options.
      - Set the $ODBCINI environment variable
        Set the $ODBCINI environment variable to provide access to your DSN by system users
      - The .netrc file
        The .netrc file contains data for logging in to a remote database server over the network.
    - Configuring a DSN in Windows™
      In Windows™ environments, Informix® ODBC Driver provides a GUI to configure DSNs.
    - Creating and configuring a DSN on Mac OS X
      The Mac OS X environment has a GUI interface for creating and configuring an Informix® ODBC data source name (DSN). This utility is the ODBC Administrator.
    - Connection string keywords that make a connection
      Use connection string keywords to make a connection with or without DSN and with the DRIVER keywords.
    - DSN migration tool
      You can use the DSN migration tool by creating a text file with an .ini extension.
  - Data types
    These topics contain information about the data types that are supported by Informix® ODBC Driver.
  - Smart large objects
    These topics describe how to store, create, and access a smart large object; how to transfer smart-large-object data; how to retrieve the status of a smart large object; and how to read or write a smart large object to or from a file.
  - Rows and collections
    Rows and collections are composite values that consist of one or more elements.
  - Client functions
    These topics describe the Informix® ODBC Driver client functions. Use these functions to access and manipulate smart large objects and rows and collections.
  - Application tracking in ODBC
    Set the CLIENT_LABEL environment variable in CSDK 4.50.xC4 onwards to assign a character string to ODBC client session and identify that character string on the database server. You can use this variable to distinguish one database session from the other.
  - Improve application performance
    These topics suggest ways to improve performance of Informix® ODBC Driver applications.
  - Error messages
    These topics describe the Informix® ODBC Driver error messages.
  - Unicode
    These topics provide a brief overview of the Unicode standard and shows how it is used within ODBC applications.
  - ODBC Smart trigger
- .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.

Configure a DSN on UNIX™

The configuration files provide information, such as driver attributes, that the driver uses to connect to DSNs.

This section provides information about driver specifications and DSN specifications on UNIX™, and describes the following DSN configuration files:

sqlhosts
odbcinst.ini
odbc.ini

To modify these files, use a text editor. The section also provides examples of driver and DSN specifications.

If you are enabling single-sign on (SSO), additional steps are in "Configuring ESQL/C and ODBC Drivers for SSO" in Informix® Security Guide.