Hi everyone,
I created a MFC MDI Application. I want to manage it in order to check, every time a View get focus, that its Document has been changed or not (for example using another hinstance of the same application or a text editor), notifying with a MessageBox something like this "(file name): this file has been modified by another program, do you want to reload it?".
How can I manage this behaviour?

Thanks a lot for your help.