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	<id>https://nsis.sourceforge.io/mediawiki/index.php?action=history&amp;feed=atom&amp;title=Reference%2FWriteRegExpandStr</id>
	<title>Reference/WriteRegExpandStr - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://nsis.sourceforge.io/mediawiki/index.php?action=history&amp;feed=atom&amp;title=Reference%2FWriteRegExpandStr"/>
	<link rel="alternate" type="text/html" href="https://nsis.sourceforge.io/mediawiki/index.php?title=Reference/WriteRegExpandStr&amp;action=history"/>
	<updated>2026-05-11T18:43:15Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.39.17</generator>
	<entry>
		<id>https://nsis.sourceforge.io/mediawiki/index.php?title=Reference/WriteRegExpandStr&amp;diff=23655&amp;oldid=prev</id>
		<title>Jan at 20:40, 4 June 2013</title>
		<link rel="alternate" type="text/html" href="https://nsis.sourceforge.io/mediawiki/index.php?title=Reference/WriteRegExpandStr&amp;diff=23655&amp;oldid=prev"/>
		<updated>2013-06-04T20:40:12Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;â† Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 20:40, 4 June 2013&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l19&quot;&gt;Line 19:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 19:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;highlight-nsis&amp;gt;WriteRegExpandStr HKLM &amp;quot;Software\My Company\My Software&amp;quot; &amp;quot;Expand String Value&amp;quot; &amp;quot;%WINDIR%\notepad.exe&amp;quot;&amp;lt;/highlight-nsis&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;highlight-nsis&amp;gt;WriteRegExpandStr HKLM &amp;quot;Software\My Company\My Software&amp;quot; &amp;quot;Expand String Value&amp;quot; &amp;quot;%WINDIR%\notepad.exe&amp;quot;&amp;lt;/highlight-nsis&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;Command introduced with NSIS v1.60&#039;&#039;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key n22049_wiki-wiki_:diff::1.12:old-21307:rev-23655 --&gt;
&lt;/table&gt;</summary>
		<author><name>Jan</name></author>
	</entry>
	<entry>
		<id>https://nsis.sourceforge.io/mediawiki/index.php?title=Reference/WriteRegExpandStr&amp;diff=21307&amp;oldid=prev</id>
		<title>Jan at 17:08, 25 November 2011</title>
		<link rel="alternate" type="text/html" href="https://nsis.sourceforge.io/mediawiki/index.php?title=Reference/WriteRegExpandStr&amp;diff=21307&amp;oldid=prev"/>
		<updated>2011-11-25T17:08:58Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;â† Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 17:08, 25 November 2011&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;WriteRegExpandStr&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;=&lt;/ins&gt;WriteRegExpandStr&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;=&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; root_key subkey key_name value&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;root_key subkey key_name value&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Write a string to the registry. root_key must be one of:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Write a string to the registry. root_key must be one of:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key n22049_wiki-wiki_:diff::1.12:old-21306:rev-21307 --&gt;
&lt;/table&gt;</summary>
		<author><name>Jan</name></author>
	</entry>
	<entry>
		<id>https://nsis.sourceforge.io/mediawiki/index.php?title=Reference/WriteRegExpandStr&amp;diff=21306&amp;oldid=prev</id>
		<title>Jan at 17:08, 25 November 2011</title>
		<link rel="alternate" type="text/html" href="https://nsis.sourceforge.io/mediawiki/index.php?title=Reference/WriteRegExpandStr&amp;diff=21306&amp;oldid=prev"/>
		<updated>2011-11-25T17:08:38Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;â† Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 17:08, 25 November 2011&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l15&quot;&gt;Line 15:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 15:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;If root_key is &amp;#039;&amp;#039;SHCTX&amp;#039;&amp;#039; or &amp;#039;&amp;#039;SHELL_CONTEXT&amp;#039;&amp;#039;, it will be replaced with HKLM if [[Reference/SetShellVarContext|SetShellVarContext]] is set to all and with HKCU if [[Reference/SetShellVarContext|SetShellVarContext]] is set to current.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;If root_key is &amp;#039;&amp;#039;SHCTX&amp;#039;&amp;#039; or &amp;#039;&amp;#039;SHELL_CONTEXT&amp;#039;&amp;#039;, it will be replaced with HKLM if [[Reference/SetShellVarContext|SetShellVarContext]] is set to all and with HKCU if [[Reference/SetShellVarContext|SetShellVarContext]] is set to current.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The error flag is set if the string could not be written to the registry. The type of the string will be REG_SZ for [[Reference/WriteRegStr|WriteRegStr]], or REG_EXPAND_STR for &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Reference/&lt;/del&gt;WriteRegExpandStr&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;|WriteRegExpandStr]]&lt;/del&gt;. If the registry key doesn&amp;#039;t exist it will be created.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The error flag is set if the string could not be written to the registry. The type of the string will be REG_SZ for [[Reference/WriteRegStr|WriteRegStr]], or REG_EXPAND_STR for WriteRegExpandStr. If the registry key doesn&amp;#039;t exist it will be created.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;highlight-nsis&amp;gt;WriteRegExpandStr HKLM &amp;quot;Software\My Company\My Software&amp;quot; &amp;quot;Expand String Value&amp;quot; &amp;quot;%WINDIR%\notepad.exe&amp;quot;&amp;lt;/highlight-nsis&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;highlight-nsis&amp;gt;WriteRegExpandStr HKLM &amp;quot;Software\My Company\My Software&amp;quot; &amp;quot;Expand String Value&amp;quot; &amp;quot;%WINDIR%\notepad.exe&amp;quot;&amp;lt;/highlight-nsis&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>Jan</name></author>
	</entry>
	<entry>
		<id>https://nsis.sourceforge.io/mediawiki/index.php?title=Reference/WriteRegExpandStr&amp;diff=21304&amp;oldid=prev</id>
		<title>Jan: Created page with &quot;WriteRegExpandStr  root_key subkey key_name value Write a string to the registry. root_key must be one of:  *&#039;&#039;HKCR&#039;&#039; or &#039;&#039;HKEY_CLASSES_ROOT&#039;&#039; *&#039;&#039;HKLM&#039;&#039; or &#039;&#039;HKEY_LOCAL_MACHINE&#039;&#039;...&quot;</title>
		<link rel="alternate" type="text/html" href="https://nsis.sourceforge.io/mediawiki/index.php?title=Reference/WriteRegExpandStr&amp;diff=21304&amp;oldid=prev"/>
		<updated>2011-11-25T17:08:06Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;WriteRegExpandStr  root_key subkey key_name value Write a string to the registry. root_key must be one of:  *&amp;#039;&amp;#039;HKCR&amp;#039;&amp;#039; or &amp;#039;&amp;#039;HKEY_CLASSES_ROOT&amp;#039;&amp;#039; *&amp;#039;&amp;#039;HKLM&amp;#039;&amp;#039; or &amp;#039;&amp;#039;HKEY_LOCAL_MACHINE&amp;#039;&amp;#039;...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;WriteRegExpandStr&lt;br /&gt;
&lt;br /&gt;
root_key subkey key_name value&lt;br /&gt;
Write a string to the registry. root_key must be one of:&lt;br /&gt;
&lt;br /&gt;
*&amp;#039;&amp;#039;HKCR&amp;#039;&amp;#039; or &amp;#039;&amp;#039;HKEY_CLASSES_ROOT&amp;#039;&amp;#039;&lt;br /&gt;
*&amp;#039;&amp;#039;HKLM&amp;#039;&amp;#039; or &amp;#039;&amp;#039;HKEY_LOCAL_MACHINE&amp;#039;&amp;#039;&lt;br /&gt;
*&amp;#039;&amp;#039;HKCU&amp;#039;&amp;#039; or &amp;#039;&amp;#039;HKEY_CURRENT_USER&amp;#039;&amp;#039;&lt;br /&gt;
*&amp;#039;&amp;#039;HKU&amp;#039;&amp;#039; or &amp;#039;&amp;#039;HKEY_USERS&amp;#039;&amp;#039;&lt;br /&gt;
*&amp;#039;&amp;#039;HKCC&amp;#039;&amp;#039; or &amp;#039;&amp;#039;HKEY_CURRENT_CONFIG&amp;#039;&amp;#039;&lt;br /&gt;
*&amp;#039;&amp;#039;HKDD&amp;#039;&amp;#039; or &amp;#039;&amp;#039;HKEY_DYN_DATA&amp;#039;&amp;#039;&lt;br /&gt;
*&amp;#039;&amp;#039;HKPD&amp;#039;&amp;#039; or &amp;#039;&amp;#039;HKEY_PERFORMANCE_DATA&amp;#039;&amp;#039;&lt;br /&gt;
*&amp;#039;&amp;#039;SHCTX&amp;#039;&amp;#039; or &amp;#039;&amp;#039;SHELL_CONTEXT&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
If root_key is &amp;#039;&amp;#039;SHCTX&amp;#039;&amp;#039; or &amp;#039;&amp;#039;SHELL_CONTEXT&amp;#039;&amp;#039;, it will be replaced with HKLM if [[Reference/SetShellVarContext|SetShellVarContext]] is set to all and with HKCU if [[Reference/SetShellVarContext|SetShellVarContext]] is set to current.&lt;br /&gt;
&lt;br /&gt;
The error flag is set if the string could not be written to the registry. The type of the string will be REG_SZ for [[Reference/WriteRegStr|WriteRegStr]], or REG_EXPAND_STR for [[Reference/WriteRegExpandStr|WriteRegExpandStr]]. If the registry key doesn&amp;#039;t exist it will be created.&lt;br /&gt;
&lt;br /&gt;
&amp;lt;highlight-nsis&amp;gt;WriteRegExpandStr HKLM &amp;quot;Software\My Company\My Software&amp;quot; &amp;quot;Expand String Value&amp;quot; &amp;quot;%WINDIR%\notepad.exe&amp;quot;&amp;lt;/highlight-nsis&amp;gt;&lt;/div&gt;</summary>
		<author><name>Jan</name></author>
	</entry>
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