Interaction between two web browsers (vb.net)

Hi I have a bit of a "Why would you even bother" question, but its important for my app Im trying to build (that's the long story short).

My app consists of two side by side web browsers a trigger in one (example is a button), and an associated action in the second (an example an alert pop-up) displayed on the other is this possible using the vb.net language?