Comparing RSLinx Classic and INTERCHANGE

RSLinx Classic SDK is a development tool specifically designed for use in Microsoft 32-bit operating system environments. However, its predecessor was INTERCHANGE Software for Windows, which continues to be the development tool for Microsoft 16-bit DOS and Windows environments.

Over the years, the number of INTERCHANGE API functions grew significantly. A comprehensive survey of software developers using INTERCHANGE revealed that most developers used less than 48 different API functions in their client applications. As a result, RSLinx Classic SDK does not support all API functions that INTERCHANGE supported, but rather it supports the API functions that developers found most useful. Also, RSLinx Classic SDK has several new API functions.

The following links illustrate similarities and differences between RSLinx Classic and INTERCHANGE API functions.