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Client APIs and toolsYou can use the HCL Informix® implementation of client APIs to develop applications for Informix® database servers.
ESQL/C GuideThe 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.
What is Informix® ESQL/C?
Informix® ESQL/C programming
What is Informix® ESQL/C? Informix® ESQL/C is an SQL application programming interface (API) that enables you to embed Structured Query Language (SQL) statements directly into a C program.
ESQL/C components

ESQL/C components

Informix® ESQL/C consists of the following software components:

The Informix ESQL/C libraries of C functions, which provide access to the database server.
The Informix ESQL/C header files, which provide definitions for the data structures, constants, and macros useful to the Informix ESQL/C program.
The esql command, which processes the Informix ESQL/C source code to create a C source file that it passes to the C compiler.
The finderr utility on the UNIX™ system and the Windows™ Informix Error Messages utility, which enable you to obtain information about error messages specific to Informix.
The locale and code-set-conversion files, which provide locale-specific information.
For more information about these files, see the Informix GLS User's Guide.

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