在单独的过程中从插件获取WPF应用程序中的TextBox焦点

Question

We are using the System.AddIn structure for creating an application for hosting apps. What we would like is to hook up to the event that a TextBox gets focus in these separate apps.

How can we do that?

I know the processes, so I can access those and maybe listen on the message pump? But how? What messages to listen for and how to determine if that control getting focus is actually a TextBox (WPF type)?

Hope for your help!

Answer 1

I don't think you can do it in an "out of the box" way.

A solution could be create a duplex WCF service exposed by all wpf processes.

Then the client can connect to the services and use a Register method to listen to events.

The service implementation will then dispatch events to the registered clients. It takes some time but I think it is the only way.

Answer 2

现在，我们正在研究使用EventManager.RegisterClassHandler方法在单独的appdomain中注册并为每个开发人员处理适配器中的实现的可能性。