Ethernet SDK and WinPLC SDK Support Question Updated: 01/30/2026

If you are using either of our Software Developer's Kits to write a custom software application for use with any of our Ethernet devices, you can use this form to send a question to the software technical support group. 

If your question is about using the Ethernet device in a 'standard product' implementation this is the wrong place, you should use the link to the general technical support group to make sure you get an answer as soon as possible.

Be sure to include your email address.

Click the following hyperlink to send an email with the required information to SDKSupport@hosteng.com:

Your name

Your Company name

Specify whether you have an Ethernet SDK or WinPLC SDK question

The Email address to respond to

A short description of issue that you are having.