Customize Sticky Frames feature

Hello and thank you CodeJock
for the sticky frames feature introduced in 10.3 of XTP, it works just great.

But I'd like to ask you if this feature can be extended to let the docking panes stick also to some custom windows of my own?
To be more clear: I learned that would need to override the CXTPDockingPaneContext::UpdateStickyFrame(CRect& rectDragFrame) function, but it's not a virtual one! Are there any other possibilities how to do this?

I like the built-in snapping to screen edges, main frame edges and docking pane edges, but I'd like to have also a snapping to an additional window of my application.

Thank you, in advance!