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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>The Be Book - System Overview - The Media Kit</title><link rel="stylesheet" href="be_book.css" type="text/css" media="all" /><link rel="shortcut icon" type="image/vnd.microsoft.icon" href="./images/favicon.ico" /><!--[if IE]>
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<![endif]--><meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /><meta name="keywords" content="Access, BeOS, BeBook, API" /><link rel="start" href="index.html" title="The Be Book" /><link rel="up" href="TheMediaKit_Overview.html" title="The Media Kit" /><link rel="prev" href="BNullParameter_Overview.html" title="BNullParameter" /><link rel="next" href="BParameterGroup_Overview.html" title="BParameterGroup" /></head><body><div id="header"><div id="headerT"><div id="headerTL"><a accesskey="p" href="BNullParameter_Overview.html" title="BNullParameter"><img src="./images/navigation/prev.png" alt="Prev" /></a> <a accesskey="u" href="TheMediaKit_Overview.html" title="The Media Kit"><img src="./images/navigation/up.png" alt="Up" /></a> <a accesskey="n" href="BParameterGroup_Overview.html" title="BParameterGroup"><img src="./images/navigation/next.png" alt="Next" /></a></div><div id="headerTR"><div id="navigpeople"><a href="http://www.haiku-os.org"><img src="./images/People_24.png" alt="haiku-os.org" title="Visit The Haiku Website" /></a></div><div class="navighome" title="Home"><a accesskey="h" href="index.html"><img src="./images/navigation/home.png" alt="Home" /></a></div><div class="navigboxed" id="navigindex"><a accesskey="i" href="ClassIndex.html" title="Index">I</a></div><div class="navigboxed" id="naviglang" title="English">en</div></div><div id="headerTC">The Be Book - System Overview - The Media Kit</div></div><div id="headerB">Prev: <a href="BNullParameter_Overview.html">BNullParameter</a>  Up: <a href="TheMediaKit_Overview.html">The Media Kit</a>  Next: <a href="BParameterGroup_Overview.html">BParameterGroup</a></div><hr /></div><div class="section"><div xmlns="" xmlns:d="http://docbook.org/ns/docbook" class="titlepage"><div><div xmlns:d="http://docbook.org/ns/docbook"><h2 xmlns="http://www.w3.org/1999/xhtml" class="title"><a id="BParameter_Overview"></a>BParameter</h2></div></div></div><a id="id590559" class="indexterm"></a><p>The <a class="link" href="BParameter.html" title="BParameter"><code class="classname">BParameter</code></a>
class is the superclass from which all controls
representing configurable parameters within a
<a class="link" href="BControllable.html" title="BControllable"><code class="classname">BControllable</code></a>
node are derived.</p><div class="admonition note"><div class="title">Note</div><div class="graphic"><img class="icon" alt="Note" width="32" src="./images/admonitions/Info_32.png" /><div class="text"><p>The word "parameter," in terms of the Media Kit, refers to a point at
which the data manipulation performed by a
<a class="link" href="BControllable.html" title="BControllable"><code class="classname">BControllable</code></a>
node can be configured, and doesn't actually refer to a user interface object.
<a class="link" href="BParameter.html" title="BParameter"><code class="classname">BParameter</code></a>-derived
objects don't implement a user interface. See the
<a class="link" href="BMediaTheme.html" title="BMediaTheme"><code class="classname">BMediaTheme</code></a>
class for information on how to create a user interface for a
<a class="link" href="BControllable.html" title="BControllable"><code class="classname">BControllable</code></a>
node.</p></div></div></div><p>The <a class="link" href="BParameter.html" title="BParameter"><code class="classname">BParameter</code></a>
class is an abstract class; you'll normally use the
<a class="link" href="BParameterGroup.html#BParameterGroup_MakeNullParameter" title="MakeNullParameter()"><code class="methodname">MakeNullParameter()</code></a>,
<a class="link" href="BParameterGroup.html#BParameterGroup_MakeDiscreteParameter" title="MakeDiscreteParameter()"><code class="methodname">MakeDiscreteParameter()</code></a>, and
<a class="link" href="BParameterGroup.html#BParameterGroup_MakeContinuousParameter" title="MakeContinuousParameter()"><code class="methodname">MakeContinuousParameter()</code></a>
functions in the
<a class="link" href="BParameterGroup.html" title="BParameterGroup"><code class="classname">BParameterGroup</code></a>
class to actually create parameters and add them to a
<a class="link" href="BParameterWeb.html" title="BParameterWeb"><code class="classname">BParameterWeb</code></a>.
For more detailed information on parameters and how to create a
<a class="link" href="BParameterWeb.html" title="BParameterWeb"><code class="classname">BParameterWeb</code></a>, see
the <a class="link" href="BParameterGroup.html" title="BParameterGroup"><code class="classname">BParameterGroup</code></a> and
<a class="link" href="BParameterWeb.html" title="BParameterWeb"><code class="classname">BParameterWeb</code></a> classes.</p></div><div id="footer"><hr /><div id="footerT">Prev: <a href="BNullParameter_Overview.html">BNullParameter</a>  Up: <a href="TheMediaKit_Overview.html">The Media Kit</a>  Next: <a href="BParameterGroup_Overview.html">BParameterGroup</a> </div><div id="footerB"><div id="footerBL"><a href="BNullParameter_Overview.html" title="BNullParameter"><img src="./images/navigation/prev.png" alt="Prev" /></a> <a href="TheMediaKit_Overview.html" title="The Media Kit"><img src="./images/navigation/up.png" alt="Up" /></a> <a href="BParameterGroup_Overview.html" title="BParameterGroup"><img src="./images/navigation/next.png" alt="Next" /></a></div><div id="footerBR"><div><a href="http://www.haiku-os.org"><img src="./images/People_24.png" alt="haiku-os.org" title="Visit The Haiku Website" /></a></div><div class="navighome" title="Home"><a accesskey="h" href="index.html"><img src="./images/navigation/home.png" alt="Home" /></a></div></div><div id="footerBC"><a href="http://www.access-company.com/home.html" title="ACCESS Co."><img alt="Access Company" src="./images/access_logo.png" /></a></div></div></div><div id="licenseFooter"><div id="licenseFooterBL"><a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/" title="Creative Commons License"><img alt="Creative Commons License" style="border-width:0" src="https://licensebuttons.net/l/by-nc-nd/3.0/88x31.png" /></a></div><div id="licenseFooterBR"><a href="./LegalNotice.html">Legal Notice</a></div><div id="licenseFooterBC"><span id="licenseText">This work is licensed under a
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