name="l00019"></a><span class="lineno">   19</span>&#160;  <span class="keyword">virtual</span> <span class="keywordtype">void</span> key(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> key, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y);</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;  <span class="keyword">virtual</span> <span class="keywordtype">void</span> mouse(<span class="keywordtype">int</span> butt