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+<!-- keywords: sqlite3_create_module sqlite3_create_module_v2 -->
+<div class=nosearch>
+<a href="intro.html"><h2>SQLite C Interface</h2></a>
+<h2>Register A Virtual Table Implementation</h2>
+</div>
+<blockquote><pre>
+int sqlite3_create_module(
+  sqlite3 *db,               /* SQLite connection to register module with */
+  const char *zName,         /* Name of the module */
+  const sqlite3_module *p,   /* Methods for the module */
+  void *pClientData          /* Client data for xCreate/xConnect */
+);
+int sqlite3_create_module_v2(
+  sqlite3 *db,               /* SQLite connection to register module with */
+  const char *zName,         /* Name of the module */
+  const sqlite3_module *p,   /* Methods for the module */
+  void *pClientData,         /* Client data for xCreate/xConnect */
+  void(*xDestroy)(void*)     /* Module destructor function */
+);
+</pre></blockquote>
+<p>
+These routines are used to register a new <a href="../c3ref/module.html">virtual table module</a> name.
+Module names must be registered before
+creating a new <a href="../vtab.html">virtual table</a> using the module and before using a
+preexisting <a href="../vtab.html">virtual table</a> for the module.</p>
+
+<p>The module name is registered on the <a href="../c3ref/sqlite3.html">database connection</a> specified
+by the first parameter.  The name of the module is given by the
+second parameter.  The third parameter is a pointer to
+the implementation of the <a href="../c3ref/module.html">virtual table module</a>.   The fourth
+parameter is an arbitrary client data pointer that is passed through
+into the <a href="../vtab.html#xcreate">xCreate</a> and <a href="../vtab.html#xconnect">xConnect</a> methods of the virtual table module
+when a new virtual table is be being created or reinitialized.</p>
+
+<p>The sqlite3_create_module_v2() interface has a fifth parameter which
+is a pointer to a destructor for the pClientData.  SQLite will
+invoke the destructor function (if it is not NULL) when SQLite
+no longer needs the pClientData pointer.  The destructor will also
+be invoked if the call to sqlite3_create_module_v2() fails.
+The sqlite3_create_module()
+interface is equivalent to sqlite3_create_module_v2() with a NULL
+destructor.</p>
+
+<p>If the third parameter (the pointer to the sqlite3_module object) is
+NULL then no new module is created and any existing modules with the
+same name are dropped.</p>
+
+<p>See also: <a href="../c3ref/drop_modules.html">sqlite3_drop_modules()</a>
+</p><p>See also lists of
+  <a href="objlist.html">Objects</a>,
+  <a href="constlist.html">Constants</a>, and
+  <a href="funclist.html">Functions</a>.</p>
+