OK, thanks for your reply.
I am still having some trouble getting it to work though.
What I am doing is making a frame using the
TK toolkit, and then passing the HWND of the frame to sf::RenderWindow. Rendering works fine, and the mouse up/down/move events work fine. The resize and close events also seem to work.
My problem is that I am not receiving any keyboard or mouse wheel events.
I'll keep working on it, I'm sure I'm just making some stupid mistake.