Hi @Jeff Gaines,
Welcome to Microsoft Q&A!
Please open your Visual Studio Installer > Modify > ensure that the “Office/SharePoint development” workload is installed.
Then, launch your Visual Studio > right-click on your project > Add > Reference > add Microsoft.Office.Interop.Word dll.
Sincerely,
Anna
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.