This is a C# "dot net" programming exercise (in Visual Studio 2022) to implement a chat system with a VBA "UserForm" in a PowerPoint (or other Microsoft Office) file.
The underlying framework is internet server/client communication with Socket.IO (https://socket.io/), with server code for JavaScript (Node.js). To set up a server, use the code in node.js.code.txt, or refer to the file "replit.txt" to set up a server on replit.com.
The Nexus executable is a Windows console program that connects to the server, and opens "Named Pipes" that can be read/written by VBA as generic files. Socket.IO uses a tag/content structure that Nexus converts to/from a "|tag|content|" string. Presently, the server/client message tags in use are only "chat_message" and "control_message".
The VBA subroutine "StartChat" uses the "Shell" command to start the Nexus application, and then opens the "ChatForm" userform. Since VBA code needs a predictable location to "Shell" the Nexus appplication, a batch command is included in the project to copy the necessary files to that location.
With VS2022, the steps to test the project from GitHub would be: "Clone a repository", "Browse a repository", and for "Open from GitHub", put in: EagleAglow/NexusDotNet, then "Clone". Open: VB_FITS.sln and then build it...
Right-click on the Solution root, and pick "Open folder in file explorer", then double click "CopyToC.bat" - This copies the application files to C:\NXSNXS.
You can create a new macro-enabled Office file, open the VBA editor, create a code module and a userform, and import the files "UserFormChat.frm" and "Module1.bas".)
Alternately, double-click "test.pptm" to open the example PowerPoint file. !!Internet Caution!! You should inspect the VBA code before allowing macros to run!!