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><H1
CLASS="title"
>VIII. COM support functions for Windows</H1
><DIV
CLASS="PARTINTRO"
><A
NAME="AEN10922"
></A
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="com.intro"
></A
>Introduction</H1
><P
>&#13;     COM is a technology which allows the reuse of code written in any
     language (by any language) using a standard calling convention and hiding
     behind APIs the implementation details such as what machine the Component is
     stored on and the executable which houses it. It can be thought of as a super
     Remote Procedure Call (RPC) mechanism with some basic object roots. It
     separates implementation from interface.
    </P
><P
>&#13;     COM encourages versioning, separation of implementation from
     interface and hiding the implementation details such as executable location and
     the language it was written in.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="com.requirements"
></A
>Requirements</H1
><P
>&#13;     COM functions are only available on the Windows version of PHP.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="com.installation"
></A
>Installation</H1
><P
>There is no installation needed to use these
functions; they are part of the PHP core.</P
><P
> The windows version of <TT
CLASS="literal"
>PHP</TT
>
has built in support for this extension. You do not need to load any additional
extension in order to use these functions.</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="com.configuration"
></A
>Runtime Configuration</H1
><P
>&#13;The behaviour of these functions is affected by settings in <TT
CLASS="filename"
>php.ini</TT
>.
</P
><P
>&#13; <DIV
CLASS="table"
><A
NAME="AEN10940"
></A
><P
><B
>Table 1. Com configuration options</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Name</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Default</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Changeable</TH
></TR
></THEAD
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>com.allow_dcom</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>"0"</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_SYSTEM</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>com.autoregister_typelib</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>"0"</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_SYSTEM</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>com.autoregister_verbose</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>"0"</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_SYSTEM</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>com.autoregister_casesensitive</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>"1"</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_SYSTEM</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>com.typelib_file</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>""</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_SYSTEM</TD
></TR
></TBODY
></TABLE
></DIV
>
 For further details and definition of the PHP_INI_* constants see
 <A
HREF="function.ini-set.html"
><B
CLASS="function"
>ini_set()</B
></A
>.
 </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="com.constants"
></A
>Predefined Constants</H1
><P
>&#13;The constants below are defined by this extension, and
will only be available when the extension has either
been compiled into PHP or dynamically loaded at runtime.
</P
><P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><TT
CLASS="constant"
><B
>CLSCTX_INPROC_SERVER</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CLSCTX_INPROC_HANDLER</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CLSCTX_LOCAL_SERVER</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CLSCTX_REMOTE_SERVER</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CLSCTX_SERVER</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CLSCTX_ALL</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_NULL</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_EMPTY</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_UI1</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_I2</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_I4</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_R4</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_R8</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_BOOL</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_ERROR</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_CY</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_DATE</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_BSTR</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_DECIMAL</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_UNKNOWN</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_DISPATCH</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_VARIANT</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_I1</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_UI2</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_UI4</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_INT</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_UINT</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_ARRAY</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>VT_BYREF</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CP_ACP</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CP_MACCP</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CP_OEMCP</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CP_UTF7</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CP_UTF8</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CP_SYMBOL</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>CP_THREAD_ACP</B
></TT
> 
    (<A
HREF="language.types.integer.html"
>integer</A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="com.seealso"
></A
>See Also</H1
><P
>&#13;     For further information on COM read the <A
HREF="http://www.microsoft.com/Com/resources/comdocs.asp"
TARGET="_top"
>COM
     specification</A
> or perhaps take a look at Don Box's 
     <A
HREF="http://www.developmentor.com/dbox/yacl.htm"
TARGET="_top"
>Yet Another COM Library (YACL)</A
> 
    </P
></DIV
></DIV
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="class.com.html"
>COM</A
>&nbsp;--&nbsp;COM class</DT
><DT
><A
HREF="class.variant.html"
>VARIANT</A
>&nbsp;--&nbsp;VARIANT class</DT
><DT
><A
HREF="function.com-addref.html"
>com_addref</A
>&nbsp;--&nbsp;
    Increases the components reference counter.
   </DT
><DT
><A
HREF="function.com-get.html"
>com_get</A
>&nbsp;--&nbsp;
    Gets the value of a COM Component's property
   </DT
><DT
><A
HREF="function.com-invoke.html"
>com_invoke</A
>&nbsp;--&nbsp;
    Calls a COM component's method.
   </DT
><DT
><A
HREF="function.com-isenum.html"
>com_isenum</A
>&nbsp;--&nbsp;Grabs an IEnumVariant</DT
><DT
><A
HREF="function.com-load-typelib.html"
>com_load_typelib</A
>&nbsp;--&nbsp;Loads a Typelib</DT
><DT
><A
HREF="function.com-load.html"
>com_load</A
>&nbsp;--&nbsp;
    Creates a new reference to a COM component
   </DT
><DT
><A
HREF="function.com-propget.html"
>com_propget</A
>&nbsp;--&nbsp;
    Gets the value of a COM Component's property
   </DT
><DT
><A
HREF="function.com-propput.html"
>com_propput</A
>&nbsp;--&nbsp;
    Assigns a value to a COM component's property
   </DT
><DT
><A
HREF="function.com-propset.html"
>com_propset</A
>&nbsp;--&nbsp;
    Assigns a value to a COM component's property
   </DT
><DT
><A
HREF="function.com-release.html"
>com_release</A
>&nbsp;--&nbsp;
    Decreases the components reference counter.
   </DT
><DT
><A
HREF="function.com-set.html"
>com_set</A
>&nbsp;--&nbsp;
    Assigns a value to a COM component's property
   </DT
></DL
></DIV
></DIV
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