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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.
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.
Using Informix® GLS
The library enables a program to access the culture-specific information in the GLS locales that Informix® provides.
Using Informix® GLS in a C-language program
Compile and link

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.
  - Using Informix® GLS
    The library enables a program to access the culture-specific information in the GLS locales that Informix® provides.
    - Internationalized programs with Informix® GLS
      You can make HCL Informix® database applications easily adaptable to any culture and language.
    - Using Informix® GLS in a C-language program
      - Compile and link
        Informix® GLS in ESQL/C applications
        in DataBlade® programs
        The way to compile and link a DataBlade® program depends on whether the program is aDataBlade client application or aDataBlade user-defined routine (UDR).
      - Initialize the library
        Before you can use functions in your application, these functions must be able to access the current processing locale.
      - Informix® GLS exceptions
        Many of the functions return a unique value if they encounter an error. To further identify the cause of the error, you can use the ifx_gl_lc_errno() function to obtain the value of the error number.
      - Allocate memory
        If the function allocates memory, this memory is only allocated within the function itself and is freed before the function returns.
      - Input and output streams
      - Run the program
    - Improve program performance
  - Character processing
    These topics describe the character-processing capabilities of the library.
  - Data formatting
    You must handle the format of locale-specific data in your applications.
  - Informix® GLS functions
    These topics describe the functions that the library provides. First is a summary of functions by categories. The rest of the topics provide reference information about the public functions, in alphabetical order.
  - Appendix
- 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.

Compile and link

The following table lists the directories that must be accessible to compile and link an ESQL/C or DataBlade® program with .


Contents	Windows™ directory	UNIX™ directory
Subdirectories for GLS locale and code-set conversion files	%INFORMIXDIR%\gls	$INFORMIXDIR/gls
Static and shared GLS libraries	%INFORMIXDIR%\lib\esql	$INFORMIXDIR/lib/esql
Two GLS header files: gls.h and ifxgls.h	%INFORMIXDIR%\incl\public	$INFORMIXDIR/incl/public

In all these directories, the INFORMIXDIR environment variable is set to the directory where your Informix® products are installed.