6. Creating an Application with OpenAPI : Sample Code : How the Synchronous Sample Code Works
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How the Synchronous Sample Code Works
The synchronous sample code consists of a number of sources files whose names begin with the prefix “apis”. Each source file demonstrates a single aspect of the OpenAPI interface and compiles into its own executable demo program.
OpenAPI functions are called synchronously: each OpenAPI function call is followed by a loop that calls IIapi_wait() repeatedly until the original OpenAPI call completes.
Note:  Database event processing is inherently asynchronous and is not demonstrated in the synchronous sample code. The asynchronous sample code provides an extensive example of database event handling using OpenAPI.