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       XSetSelectionOwner, XGetSelectionOwner, XConvertSelection - manipulate window selection


       int XSetSelectionOwner(Display *display, Atom selection, Window owner, Time time);

       Window XGetSelectionOwner(Display *display, Atom selection);

       int XConvertSelection(Display *display, Atom selection, Atom target, Atom property, Window
              requestor, Time time);


       display   Specifies the connection to the X server.

       owner     Specifies the owner of the specified selection atom.  You can pass a  window  or

       property  Specifies the property name.  You also can pass None.

       requestor Specifies the requestor.

       selection Specifies the selection atom.

       target    Specifies the target atom.

       time      Specifies the time.  You can pass either a timestamp or CurrentTime.


       The  XSetSelectionOwner  function changes the owner and last-change time for the specified
       selection and has no effect if the specified time is earlier than the current  last-change
       time  of  the  specified selection or is later than the current X server time.  Otherwise,
       the last-change time is set to the  specified  time,  with  CurrentTime  replaced  by  the
       current  server  time.   If  the  owner window is specified as None, then the owner of the
       selection becomes None (that is, no owner).  Otherwise, the owner of the selection becomes
       the client executing the request.

       If  the  new  owner (whether a client or None) is not the same as the current owner of the
       selection and the current owner is not None, the current owner is  sent  a  SelectionClear
       event.   If  the client that is the owner of a selection is later terminated (that is, its
       connection is closed) or if the owner window it has specified  in  the  request  is  later
       destroyed,  the  owner of the selection automatically reverts to None, but the last-change
       time  is  not  affected.   The  selection  atom  is  uninterpreted  by   the   X   server.
       XGetSelectionOwner  returns  the  owner  window, which is reported in SelectionRequest and
       SelectionClear events.  Selections are global to the X server.

       XSetSelectionOwner can generate BadAtom and BadWindow errors.

       The XGetSelectionOwner function returns the window ID  associated  with  the  window  that
       currently  owns  the  specified  selection.   If  no selection was specified, the function
       returns the constant None.  If None is returned, there is no owner for the selection.

       XGetSelectionOwner can generate a BadAtom error.

       XConvertSelection requests that the specified selection  be  converted  to  the  specified
       target type:

       ·    If  the specified selection has an owner, the X server sends a SelectionRequest event
            to that owner.

       ·    If  no  owner  for  the  specified  selection  exists,  the  X  server  generates   a
            SelectionNotify event to the requestor with property None.

       The  arguments  are passed on unchanged in either of the events.  There are two predefined
       selection atoms: PRIMARY and SECONDARY.

       XConvertSelection can generate BadAtom and BadWindow errors.


       BadAtom   A value for an Atom argument does not name a defined Atom.

       BadWindow A value for a Window argument does not name a defined Window.


       Xlib - C Language X Interface