** Summary **
'''[http://web.eecs.umich.edu/~mckay/computer/xop0.4.tar.gz%|%Xop]''' provides Tcl/Tk with access to various low-level X window system functions.
** See Also **
[http://www.flightlab.com/~joe/gutter/packages/xop.html%|%xop]: in the [GUTTER]
** Description **
Capabilities include:
* The ability to query arbitrary windows on Tk's display
* Access to and control of X cut buffers
* Bell frequency, volume, and duration control
* Access to X drawables, including dumping their contents to Tk images
* Querying and manipulation of the X event queue
* Reading of window-manager-related window properties
* Colormap control
These facilities are provided via [`[xop`]`. The intended purpose of the Xop
package is to provide certain low-level X11 facilities required by window
managers, but the package need not be used in that way.
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