The InterSystems Callout Gateway (implemented in the InterSystems IRIS™ $ZF functions) allows you to invoke external programs and system services from InterSystems IRIS. It also provides a way to integrate your custom code into InterSystems IRIS.
This book addresses the following topics:
Introduction introduces concepts important to understanding the rest of this book, summarizes the capabilities of the InterSystems Callout Gateway, and provides links to other resources.
Creating an InterSystems Callout Library describes how to create a Callout shared library with functions that can be invoked from InterSystems IRIS. Code can be written in any language that supports C/C++ calling conventions.