Intercepting modifications to FlexGrid of another program

I would like to intercept changes that are made to a flexgrid that belongs to a separately running program.

The flexgrid is continuously updated with changing content.
The other program is a java program.

Is there a way to intercept this data?

Welcome to the forums.

Intercepting messages form another process cannot be done with VB alone. What you are describing requires subclassing. Subclassing is a very advanced topic and to subclass windows outside of your process requires standard DLLs, not the Active-X kind that VB can create.

There is a project in the code utility bank that may help in your task. But be forewarned, subclassing can be very difficult and often results in crashes until you get it perfected.