从使用C ++编写的桌面应用程序转换为基于Web的应用程序

We have a mature Windows desktop application written in C++. The application's GUI sits on top of a windows DLL that does most of the work for the GUI (it's kind of the engine). It, too, is written in C++. We are considering transitioning the Windows app to be a web-based app for various reasons. We have a mature Windows desktop application wr