Shoutbox

And if you don't want to juggle with interfaces: you can create the window in the script, and send the window handle from the created window (instead of the object itself) to the DLL. And in the DLL you use the normal Windows APIs to manipulate the controls on the window.

Or, in the same way, if the only thing you do in the DLL is filling that particular listview, send the window handle of that listview control to the DLL. In the DLL you use the normal Windows APIs to populate the listview.