Calling different apps

Question

Hi,

 

I have done a Widget I a web application. Now I have a problem that I can't solve.

In my widget different kind of web apps calls.

 

For example, create a booking. If I call the app create a booking from my window and in that app I register a booking and closes down the app. I want to come back to my widget and refresh the widget so that I can see the booking that I created in the other app.

 

How can I refresh my Widget?