data</i>)<i>
     </i></td>
<td align="right">Functie</td>
</tr>
</table>
<table width="95%" align="center">
<tr><td>
Make the history entry at offset <var>which</var> have <var>line</var> and <var>data</var>. 
This returns the old entry so the caller can dispose of any
application-specific data.  In the case
of an invalid <var>which</var>, a <code>NULL</code> pointer is returned. 
</td></tr>
</table>

<p>
<table width="100%">
<tr>
<td align="left">void <b>clear_history</b><i> </i>(<i>void</i>)<i>
     </i>