hpux man page for xgetwmprotocols

XGetWMProtocols()														 XGetWMProtocols()

Name
  XGetWMProtocols - get a window's WM_PROTOCOLS property.

Synopsis
  Status XGetWMProtocols(display, w, protocols_return, count_return)
	Display *display;
	Window w;
	Atom **protocols_return;
	int *count_return;

Arguments
  display   Specifies a connection to an X server; returned from XOpenDisplay().

  w	    Specifies the window.

  protocols_return
	    Returns the list of protocols.

  count_return
	    Returns the number of protocols in the list.

Returns
  Zero on failure, non-zero on success.

Availability
  Release 4 and later.

Description
  XGetWMProtocols()  gets the list of atoms stored in the WM_PROTOCOLS property of the specified window.  These atoms describe window manager
  protocols in which the owner of this window is willing to participate.

  If the property exists, is of type ATOM, is of format 32, and the atom WM_PROTOCOLS can be  interned,  XGetWMProtocols()  sets  the  proto-
  cols_return argument to a list of atoms, sets the count_return argument to the number of elements in list, and returns a a non-zero status.
  Otherwise, it sets neither of the return arguments and returns a zero status.

  The list of standard protocols at present is as follows:

  WM_TAKE_FOCUS    Assignment of keyboard focus.

  WM_SAVE_YOURSELF Save client state warning.

  WM_DELETE_UNKNOWN
		   Request to delete top-level window.

  For more information, see Volume One, Chapter 12, Interclient Communication.

Errors
  BadWindow

See Also
  XSetWMProtocols().

Xlib - Window Manager Hints													 XGetWMProtocols()