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<!DOCTYPE task
  PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">
<task id="GUID-39186342-960A-46A4-BC35-851F53665FA8" xml:lang="en"><title>Writing
the Version 3 Registration Resource File</title><shortdesc>The version 3 registration resource file is an evolution of the
version 2 . This version is evolved to accommodate extended interfaces. </shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody>
<steps id="GUID-4DD07DEC-6017-4237-BE46-1D69E5FBD744-GENID-1-10-1-11-1-1-8-1-4-1-5-1-4-1-5-1-6-1-3-1">
<step id="GUID-9A69E5AD-E938-4092-A8C2-CB65C37C8962-GENID-1-10-1-11-1-1-8-1-4-1-5-1-4-1-5-1-6-1-3-1-1"><cmd>Set Info_format
to the type of info record that is, <codeph>IMPLEMENTATION_INFO</codeph> or <codeph>BINARY_IMPLEMENTATION_INFO</codeph>.
 </cmd>
</step>
<step id="GUID-BCDAAECA-1C25-4D09-A495-97949B5EF2C8"><cmd><codeph>default_data</codeph>:
The data identifier field used by the resolver to determine if the implementation
matches a client request.</cmd>
<info><p>In <codeph>IMPLEMENTATION_INFO</codeph> structure, the data type
is changed to accommodate maximum 2 strings with 255 bytes each. </p><p>In <codeph>BINARY_IMPLEMENTATION_INFO</codeph>,
the data type is changed to accommodate a maximum 512 bytes.  </p></info>
</step>
<step id="GUID-7892DD48-0E0A-4209-B463-5DDA71F8021D"><cmd><codeph>opaque_data</codeph>:
A binary data field that can contain additional data. This additional data
can be used by the custom resolvers.  </cmd>
<info><p>In <codeph>IMPLEMENTATION_INFO</codeph> structure, the data type
is changed to accommodate maximum 2 strings with 255 bytes each. </p><p>In <codeph>BINARY_IMPLEMENTATION_INFO</codeph> structure,
the data type is changed to accommodate a maximum 512 bytes.  </p></info>
</step>
<step id="GUID-3A4E66EE-31A6-4717-A6A6-14C4881E962C"><cmd><codeph>extended_interfaces</codeph> a
maximum 8 UID's extended interfaces for both <codeph>IMPLEMENTATION_INFO</codeph> structure
and <codeph>BINARY_IMPLEMENTATION_INFO</codeph> structure.  </cmd>
</step>
<step id="GUID-76A1CE8A-169C-43A2-9231-B310FDF8EEC2"><cmd><codeph>FLAG_ROM_ONLY</codeph> changed
from bool data type to bit flag.  </cmd>
<info><p><codeph>rom_only</codeph> set to 1 indicates the ROM-only implementation
must be used.  </p><p><codeph>rom_only</codeph> set to 0 indicates the ROM-only
implementation can be overidden.</p></info>
</step>
<step id="GUID-AF2EFD83-7116-472A-A1AE-4043236EA238"><cmd>In <codeph>REGISTRY_INFO</codeph> structure,
the resource_format_version must be <codeph>RESOURCE_FORMAT_VERSION_3</codeph> .
 </cmd>
</step>
<step id="GUID-668E4137-3339-4C40-8721-9F9109C936A1"><cmd>In I<codeph>NTERFACE_INFOstructure</codeph>,
the <codeph>interface_uid</codeph> is renamed to <codeph>instantiation_interface_uid</codeph>. </cmd>
</step>
<step id="GUID-C4B7C81E-0472-4401-8CA2-EC46D5E48EC5"><cmd>In <codeph>REGISTRY_INFO</codeph> structure,
the <codeph>resource_format_version</codeph> must be <codeph>RESOURCE_FORMAT_VERSION_3</codeph>.
 </cmd>
</step>
</steps>
<example><codeblock xml:space="preserve">#define IMPLEMENTATION_INFO_RECORD_TYPE1 1
STRUCT IMPLEMENTATION_INFO
	{
	BYTE		info_format;		// = IMPLEMENTATION_INFO_RECORD_TYPE1
	LONG   		implementation_uid;
	BYTE   		version_no;
	LTEXT  		display_name;
	LEN BYTE LTEXT8  default_data[];		// maximum 2 strings with 255 bytes each	
	LEN BYTE LTEXT8  opaque_data[];		// maximum 2 strings with 255 bytes each
	LONG   		extended_interfaces[]; 	// maximum 8 extended interfaces 
	BYTE		flags;			
	}

#define IMPLEMENTATION_INFO_RECORD_TYPE2 2
STRUCT BINARY_IMPLEMENTATION_INFO
	{
	BYTE	  info_format;		        // = IMPLEMENTATION_INFO_RECORD_TYPE2
	LONG	  implementation_uid;
	BYTE	  version_no;
	LTEXT	  display_name;
	BYTE      default_data[];			// maximum 512 bytes
	BYTE 	  opaque_data[];			// maximum 512 bytes
	LONG	  extended_interfaces[];		// maximum 8 extended interfaces 
	BYTE	  flags;			
	}

STRUCT INTERFACE_INFO
	{
	LONG	instantiation_interface_uid;
	STRUCT	implementations[];		// maximum 8 implementations for each interface
	}

STRUCT REGISTRY_INFO
	{
	LONG	resource_format_version;    	// Use RESOURCE_FORMAT_VERSION_3
	LONG	dll_uid;
	STRUCT	interfaces[];			// maximum 4 interfaces
	} </codeblock></example>
<postreq><p><ul>
<li><p>Maximum of four<codeph>INTERFACE_INFO</codeph> structures can be defined
in one resource file.  </p></li>
<li><p>Maximum of eight <codeph>IMPLEMENTATION_INFO</codeph> or <codeph>BINARY_IMPLEMENTATION_INFO</codeph> structures
in each <codeph>INTERFACE_INFO</codeph> . Totally eight structures can be
defined.  </p></li>
<li><p>Maximum eight extended interfaces in each<codeph> IMPLEMENTATION_INFO</codeph> record. </p></li>
<li><p>In a <codeph>IMPLEMENTATION_INFO</codeph> record a maximum of two strings
with 255 bytes each can be used for <codeph>default_data</codeph> or<codeph>opaque_data</codeph> definitions. </p></li>
<li><p>In a <codeph>BINARY_IMPLEMENTATION_INFO</codeph> record, a maximum
of 512 bytes each for <codeph>default_data</codeph> or <codeph>opaque_data</codeph> definitions.
 </p></li>
</ul></p></postreq>
</taskbody><related-links>
<link href="GUID-B541BD01-29BE-4CB7-9420-ABEE0BDC9BA4.dita"><linktext>Writing a
Standard Registration Resource File</linktext></link>
<link href="GUID-64D62DD8-3D9C-4659-9658-C0B4D74D6E69.dita"><linktext>Writing the
Version 2 Registration Resource File</linktext></link>
</related-links></task>