Not exactly a PB question, but old DataWindow.NET issue.  At work, there is an old Client/Server VS2008 application written in VB with DataWindow.NET components throughout.  I have successfully migrated the application to VS2017 and can run the EXE on Windows 7.  When I try to run on Windows 10, the line that issues the connect to the Informix DB raises a System.NullReferenceException: "Object reference not set to an instance of an object".  It references DataWindowInterop.dll and DataWindowInterop.TransactionFunctions in the QuickWatch for the error.  I have the same DLL's in the Windows 7 EXE directory as I do with the one on Windows 10.   

We are in the process of removing the DW.NET components, but it will take time.  In the meantime, we would like to get the application running on Windows 10. 

Any ideas/suggestions would be appreciated.