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<!DOCTYPE html>
<html lang="en">
<head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Plugin Type+Metadata Mechanism for Windows DLL Plugins</title>
<style>
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color: #046D95 !important;
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body {
color: black !important;
background-color: #f5f5f5 !important;
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align-items: center;
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<span style="font-family:Verdana">← <a href="index.html">Back to Standards index</a></span><br><br>
<div id="content">
<div class="container"><div class="page"><pre>VIATHINKSOFT/WEBFAN D. Marschall
SPECIFICATION No. 18 ViaThinkSoft
First Draft: 2024 5 January 2025
=== Plugin Type+Metadata Mechanism for Windows DLL Plugins ===
Abstract
This document describes a method for plugins written as Windows DLL
files, to present the plugin's type and metadata.
Identification of this Document
Revision: 2025-01-05
State: In Force
Filename: viathinksoft-std-0018-dll-plugin-info.txt
URN: urn:x-viathinksoft:std:0018:2025-01-05
OID: 1.3.6.1.4.1.37476.3.3.1
{ iso(1) identified-organization(3) dod(6) internet(1)
private(4) enterprise(1) 37476 specifications(3)
interface(3) dll-plugin-info(1) }
WEID: weid:pen:SX0-3-3-1-0
IETF/RFC: (None)
Attachments
(None)
Copyright Notice
Copyright (c) 2011-2025 ViaThinkSoft and the persons identified as
the document authors. All rights reserved.
Licensed under the terms of the Apache 2.0 License.
<span class="grey">Marschall [Page 1]</span></pre>
</div><div class="page"><span class="noprint" id="page-2"><span class="grey">VTS/WF STD. 18 DLL Plugin Info 5 January 2025</span>
Table of Contents
<a href="#section-1">1</a> Introduction . . . . . . . . . . . . . . . . . . . . . . . . . <a href="#page-3">3</a>
<a href="#section-1.1">1.1</a> Terminology . . . . . . . . . . . . . . . . . . . . . . . . <a href="#page-3">3</a>
<a href="#section-2">2</a> Definition . . . . . . . . . . . . . . . . . . . . . . . . . . <a href="#page-3">3</a>
<a href="#section-3">3</a> Parameter Description . . . . . . . . . . . . . . . . . . . . . <a href="#page-3">3</a>
<a href="#section-3.1">3.1</a> Input Paramters . . . . . . . . . . . . . . . . . . . . . . <a href="#page-3">3</a>
<a href="#section-3.2">3.2</a> Return Value . . . . . . . . . . . . . . . . . . . . . . . <a href="#page-4">4</a>
<a href="#section-4">4</a> Security Considerations . . . . . . . . . . . . . . . . . . . . <a href="#page-4">4</a>
<a href="#section-5">5</a> RA Considerations . . . . . . . . . . . . . . . . . . . . . . . <a href="#page-4">4</a>
<a href="#section-6">6</a> References . . . . . . . . . . . . . . . . . . . . . . . . . . <a href="#page-4">4</a>
<a href="#section-6.1">6.1</a> Normative References . . . . . . . . . . . . . . . . . . . <a href="#page-4">4</a>
<a href="#section-6.2">6.2</a> Informative References . . . . . . . . . . . . . . . . . . <a href="#page-4">4</a>
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . <a href="#page-5">5</a>
<span class="grey">Marschall [Page 2]</span></pre>
</div><div class="page"><span class="noprint" id="page-3"><span class="grey">VTS/WF STD. 18 DLL Plugin Info 5 January 2025</span>
<h2><a class="selflink" id="section-1" href="#section-1">1</a> Introduction</h2>
This recommendation applies to applications written for Microsoft
Windows (EXE files) that use plugins which have a DLL file structure.
It defines a method that can be used to check if the plugin is
compatible with the application, and also returns metadata about the
plugin.
<h3><a class="selflink" id="section-1.1" href="#section-1.1">1.1</a> Terminology</h3>
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in
<a href="https://datatracker.ietf.org/doc/html/bcp14">BCP 14</a> [<a href="https://datatracker.ietf.org/doc/html/rfc2119" title=""Key words for use in RFCs to Indicate Requirement Levels"">RFC2119</a>] [<a href="https://datatracker.ietf.org/doc/html/rfc8174">RFC8174</a>] when, and only when, they appear in all
capitals, as shown here.
<h2><a class="selflink" id="section-2" href="#section-2">2</a> Definition</h2>
The undecorated method is defined as follows:
Delphi: function VtsPluginID(lpTypeOut: PGUID; lpIdOut: PGUID;
lpVerOut: PDWORD; lpAuthorInfo: Pointer): HRESULT; stdcall;
C++: HRESULT __stdcall VtsPluginID(GUID* lpTypeOut, GUID* lpIdOut,
DWORD* lpVerOut, void* lpAuthorInfo);
<h2><a class="selflink" id="section-3" href="#section-3">3</a> Parameter Description</h2>
All data MUST BE little endian.
<h3><a class="selflink" id="section-3.1" href="#section-3.1">3.1</a> Input Paramters</h3>
if lpTypeOut is not NULL, then the method MUST write a GUID that
defines the plugin "type" (note that an application might support
multiple plugin "types").
If lpIdOut is not NULL, then the method MUST write a GUID that is
unique to this plugin, but stays the same for different versions of
that plugin.
If lpVerOut is not NULL, then the method MUST write a DWORD in the
following structure:
- 1 byte major version
- 1 byte minor version
- 1 byte patch
- 1 byte build
Example: 0x01020304 means version 1.2.3.4
<span class="grey">Marschall [Page 3]</span></pre>
</div><div class="page"><span class="noprint" id="page-4"><span class="grey">VTS/WF STD. 18 DLL Plugin Info 5 January 2025</span>
If lpAuthorInfo is not NULL, then the method MUST write a variable
size structure which contains the following information in order:
- PluginName
- PluginAuthor
- PluginVersion
- PluginCopyright
- PluginLicense
- PluginMoreInfo
Each string is an UTF-16 string (WideString) prepended by a 16-bit
WORD that defines the length of the string. No zero terminator
bytes.
Note that the caller must make sure that the size of the memory
location is big enough; recommended 4096 bytes.
<h3><a class="selflink" id="section-3.2" href="#section-3.2">3.2</a> Return Value</h3>
A valid HRESULT should be returned.
<h2><a class="selflink" id="section-4" href="#section-4">4</a> Security Considerations</h2>
None
<h2><a class="selflink" id="section-5" href="#section-5">5</a> RA Considerations</h2>
OID: 1.3.6.1.4.1.37476.3.3.1
WEID: weid:pen:SX0-3-3-1-0
ASN1: { iso(1) identified-organization(3) dod(6) internet(1)
private(4) enterprise(1) 37476 specifications(3) interface(3)
dll-plugin-info(1) }
IRI: /ISO/Identified-Organization/6/1/4/1/37476/Specifications/
Interface/DLLPluginInfo
<h2><a class="selflink" id="section-6" href="#section-6">6</a> References</h2>
<h3><a class="selflink" id="section-6.1" href="#section-6.1">6.1</a> Normative References</h3>
[<a id="ref-RFC2119">RFC2119</a>] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", <a href="https://datatracker.ietf.org/doc/html/bcp14">BCP 14</a>, <a href="https://datatracker.ietf.org/doc/html/rfc2119">RFC 2119</a>,
DOI 10.17487/RFC2119, March 1997,
<<a href="https://www.rfc-editor.org/info/rfc2119">https://www.rfc-editor.org/info/rfc2119</a>>.
<h3><a class="selflink" id="section-6.2" href="#section-6.2">6.2</a> Informative References</h3>
None
<span class="grey">Marschall [Page 4]</span></pre>
</div><div class="page"><span class="noprint" id="page-5"><span class="grey">VTS/WF STD. 18 DLL Plugin Info 5 January 2025</span>
Authors' Addresses
Daniel Marschall
Postfach 11 53
69243 Bammental
Germany
Email: [email protected]
URI: <a href="https://www.viathinksoft.com/">https://www.viathinksoft.com/</a>
Marschall [Page 5]
</pre></div></div></div>
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