osx man page for tk_clearselection

Tk_ClearSelection(3)					       Tk Library Procedures					      Tk_ClearSelection(3)

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NAME
       Tk_ClearSelection - Deselect a selection

SYNOPSIS
       #include <tk.h>

       Tk_ClearSelection(tkwin, selection)

ARGUMENTS
       Tk_Window tkwin (in)	     The selection will be cleared from the display containing this window.

       Atom selection (in)	     The name of selection to be cleared.
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DESCRIPTION
       Tk_ClearSelection  cancels  the	selection  specified by the atom selection for the display containing tkwin.  The selection need not be in
       tkwin itself or even in tkwin's application.  If there is a window anywhere on tkwin's display that owns  selection,  the  window  will	be
       notified and the selection will be cleared.  If there is no owner for selection on the display, then the procedure has no effect.

KEYWORDS
       clear, selection

Tk									4.0						      Tk_ClearSelection(3)