I have an old app that is a DDE server. I access if with my app that connects and gets data points. All has been working until Windows 10. Now the server app does not respond to the data requests. This is not using NetDDE. All communications are between apps on the same computer, started by the same user.
Does anyone have an explanation for this problem. Is there some new security protocol that must be implemented? I have searched extensively, but most posts on the subject are with regard to Microsoft Office programs, and networking issues with DDE.
What I have tried:
Using Spy++ to see that there are no responses to the DDE request.