GdkCursor pointer for the cursor currently set on the
specified GdkWindow, or NULL. If the return value is NULL then
there is no custom cursor set on the specified window, and it is
using the cursor for its parent window.gdkWindowGetCursor(object)objectGdkCursor] a GdkCursor, or NULL. The returned object is owned
by the GdkWindow and should not be unreferenced directly. Use
gdkWindowSetCursor to unset the cursor of the window