Passing previous modifier value to next scripted modifier

Basically the problem is that I can't pass the selected edges of an EditPoly modifier to the scripted modifier above it. I want to put the selected edge indexes into an array of the scripted modifier...

Just as a push modifier affects the selected vertices/edges/faces under the push modifier, for example an edit poly, I want to do the same thing with a scripted modifier plug-in.

So, is there a way to do this thing? I can't find it in the maxscript help.

Thanks in advance!