Not in a manner that currently would be of any use based on what I can try doing. For classic skins as I've got full control over the window handling I can determine what is being clicked on so it can still allow for things to work like clicking on the buttons & all of that whilst blocking titlebars allowing moving. Whereas I'm not aware of a way that'd allow me to block just interactions on titlebars due to how gen_ff does its windows along with not being able to determine what that part of the window might actually be. I can put in something so you can try out what I can do but the experiencing from a quick re-test of code I'd previously tried isn't nice as nothing can properly react to the mouse.