gdk-window-support-multidevice (window)

window -- a gdk-window object
support-multidevice -- true to enable multidevice support in window

The function gdk-window-support-multidevice returns true if the window is aware of the existence of multiple devices. The function (setf gdk-window-support-multidevice) will enable multidevice features in window.

Multidevice aware windows will need to handle properly multiple, per device enter/leave events, device grabs and grab ownerships.