how do I send info from one swf to another swf same page

I am using multiple swfs on one page separated in tables. I want to be able to send information from one swf to another, and I am not sure how this process works.

As an example, lets say I have 3 swfs, one is layered in the background so you cant see it, and the other two are visible next to each other.
swfA = Webservice swf
swfB = visible menu
swfC = content

The swf in the background is connected to a WebService. I want swfB when told, to tell swfA to get information and send that info to swfC.

I know I could make it one whole swf, but it is imperative for the project to keep each swf separate.

I hope I am being clear.

This is killing my brain.

Local Connection