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NAME
     Tk_ClipboardClear, Tk_ClipboardAppend - Manage the clipboard

SYNOPSIS
     #include <tk.h>

     int
     Tk_ClipboardClear(interp, tkwin)

     int
     Tk_ClipboardAppend(interp, tkwin, target, format, buffer)

ARGUMENTS
     Tcl_Interp          *interp (in)      Interpreter to use for
                                           reporting errors.

     Tk_Window           tkwin   (in)      Window that determines
                                           which  display's clip-
                                           board to manipulate.

     Atom                target  (in)      Conversion  type   for
                                           this  clipboard  item;
                                           has  same  meaning  as
                                           target   argument   to
                                           Tk_CreateSelHandler.

     Atom                format  (in)      Representation to  use
                                           when      data      is
                                           retrieved;   has  same
                                           meaning    as   format
                                           argument            to
                                           Tk_CreateSelHandler.

     char                *buffer (in)      Null terminated string
                                           containing the data to
                                           be  appended  to   the
                                           clipboard.
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DESCRIPTION
     These two procedures manage the clipboard for Tk.  The clip-
     board  is  typically  managed  by  calling Tk_ClipboardClear
     once, then calling Tk_ClipboardAppend to add  data  for  any
     number of targets.

     Tk_ClipboardClear claims the CLIPBOARD selection  and  frees
     any  data  items  previously stored on the clipboard in this
     application. It normally returns TCL_OK,  but  if  an  error
     occurs  it  returns TCL_ERROR and leaves an error message in
     interp->result.  Tk_ClipboardClear must be called  before  a
     sequence of Tk_ClipboardAppend calls can be issued.

     Tk_ClipboardAppend appends a buffer of  data  to  the  clip-
     board.   The  first buffer for a given target determines the
     format for that target.  Any  successive  appends  for  that
     target  must  have  the  same  format  or  an  error will be
     returned.  Tk_ClipboardAppend returns TCL_OK if  the  buffer
     is successfully copied onto the clipboard.  If the clipboard
     is not currently owned by the  application,  either  because
     Tk_ClipboardClear  has  not been called or because ownership
     of  the  clipboard  has  changed  since  the  last  call  to
     Tk_ClipboardClear,  Tk_ClipboardAppend returns TCL_ERROR and
     leaves an error message in interp->result.

     In order to guarantee atomicity, no  event  handling  should
     occur    between   Tk_ClipboardClear   and   the   following
     Tk_ClipboardAppend calls (otherwise someone could retrieve a
     partially  completed  clipboard or claim ownership away from
     this application).

     Tk_ClipboardClear may invoke callbacks, including  arbitrary
     Tcl  scripts, as a result of losing the CLIPBOARD selection,
     so any calling function should take care to be reentrant  at
     the point Tk_ClipboardClear is invoked.


KEYWORDS
     append, clipboard, clear, format, type

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