php-doc-en/reference/com/functions/com-get-active-object.xml
2014-09-05 07:44:07 +00:00

103 lines
3.4 KiB
XML

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.com-get-active-object" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>com_get_active_object</refname>
<refpurpose>Returns a handle to an already running instance of a COM object</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>variant</type><methodname>com_get_active_object</methodname>
<methodparam><type>string</type><parameter>progid</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>code_page</parameter></methodparam>
</methodsynopsis>
<para>
<function>com_get_active_object</function> is similar to creating a new
instance of a <xref linkend="class.com"/> object, except that it will
only return an object to your script if the object is already running.
OLE applications use something known as the "<literal>Running Object Table</literal>" to
allow well-known applications to be launched only once; this function
exposes the COM library function GetActiveObject() to get a handle on a
running instance.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>progid</parameter></term>
<listitem>
<para>
<parameter>progid</parameter> must be either the ProgID or CLSID for
the object that you want to access (for example
<literal>Word.Application</literal>).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>code_page</parameter></term>
<listitem>
<para>
Acts in precisely the same way that it does for the <xref
linkend="class.com"/> class.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
If the requested object is running, it will be returned to your script
just like any other COM object.
</para>
</refsect1>
<refsect1 role="errors">
&reftitle.errors;
<para>
There are a variety of reasons why this function might fail, the most
common being that the object is not already running. In that situation,
the exception error code will be <constant>MK_E_UNAVAILABLE</constant>;
you can use the <literal>getCode</literal> method of the exception object
to check the exception code.
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<warning>
<para>
Using <function>com_get_active_object</function> in a web server context
is not always a smart idea. Most COM/OLE applications are not designed
to handle more than one client concurrently, even (or especially!)
Microsoft Office. You should read <link
xlink:href="&url.msoffice.serverside;">Considerations for Server-Side
Automation of Office</link> for more information on the general issues
involved.
</para>
</warning>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->