Tk_ClipboardClear, Tk_ClipboardAppend - Manage the clipboard

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

       Tk_Window tkwin (in)                  Window that determines which display's clipboard 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.

       const char *buffer (in)               Null  terminated  string  containing the data to be appended to the
                                             clipboard.
________________________________________________________________________________________________________________

       These two procedures manage the clipboard  for  Tk.   The  clipboard  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 interpreter interp's 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 clipboard.   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 the result
       of interpreter interp.

       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  re-entrant  at  the  point
       Tk_ClipboardClear is invoked.

       append, clipboard, clear, format, type

Tk                                                     4.0                                Tk_ClipboardClear(3tk)

       Tk_ClipboardClear, Tk_ClipboardAppend - Manage the clipboard

#include<tk.h>

       int
       Tk_ClipboardClear(interp,tkwin)

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