Determine the owner of the given selection.
Note that the return value may be owned by a different
process if a foreign window was previously created for that
window, but a new foreign window will never be created by this call.
Since 2.2
if there is a selection owner for this window, and it is a window known to the current process, the GdkWindow that owns the selection, otherwise NULL. [transfer none]
Determine the owner of the given selection. Note that the return value may be owned by a different process if a foreign window was previously created for that window, but a new foreign window will never be created by this call. Since 2.2