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Client APIs and toolsYou can use the HCL OneDB™ implementation of client APIs to develop applications for HCL OneDB™ database servers.
ESQL/C GuideThe HCL OneDB™ ESQL/C Programmer's Manual explains how to use , the HCL OneDB™ implementation of Embedded Structured Query Language (SQL) for C (ESQL/C), to create client applications with database-management capabilities.
Database server communication
Exception handling
Exception handling with the sqlca structureAn alternative way to obtain diagnostic information is through the SQL Communications Area. When an SQL statement executes, the database server automatically returns information about the success or failure of the statement in a C structure that is called sqlca.
Display error text (Windows™)Your application can use the HCL OneDB™ ERRMESS.HLP file to display text that describes an error and its corrective action.

Display error text (Windows)

Your application can use the HCL OneDB™ ERRMESS.HLP file to display text that describes an error and its corrective action.

You can call the Windows™ API WinHelp() with the following WinHelp parameters.

WinHelp parameter: Data
HELP_CONTEXT: Error number from SQLCODE or sqlca.sqlcode
HELP_CONTEXTPOPUP: Error number from SQLCODE or sqlca.sqlcode
HELP_KEY: Pointer to string that contains error number from SQLCODE or sqlca.sqlcode and is converted to ASCII with sprintf() or wsprintf()
HELP_PARTIALKEY: Pointer to string that contains error number from SQLCODE or sqlca.sqlcode and is converted to ASCII with sprintf() or wsprintf()