Doc.

ISHelp/isxfunc.xml

@@ -580,6 +580,19 @@ begin
   Result := IsDotNetInstalled(net462, 0); //Returns True if .NET Framework version 4.6.2 is installed, or a compatible version such as 4.8
   if not Result then
     SuppressibleMsgBox(FmtMessage(SetupMessage(msgWinVersionTooLowError), ['.NET Framework', '4.6.2']), mbCriticalError, MB_OK, IDOK);
+end;</pre></example>
+      </function>    
+      <function>
+        <name>IsMsiProductInstalled</name>
+        <prototype>function IsMsiProductInstalled(const UpgradeCode: String; const PackedMinVersion: Int64): Boolean;</prototype>
+        <description><p>Returns True if a MSI product with the specified UpgradeCode and PackedMinVersion is installed.</p>
+<p>If there are multiple products installed with the specified UpgradeCode only the version of the first product returned by the system is checked.</p>
+<p>An exception will be raised if an error occurs.</p></description>
+        <example><pre>function InitializeSetup: Boolean;
+begin
+  Result := IsMsiProductInstalled('{20400CF0-DE7C-327E-9AE4-F0F38D9085F8}', PackVersionComponents(12, 0, 0, 0)); //Returns True if Visual C++ 2013 Redistributable (x64) is installed
+  if not Result then
+    SuppressibleMsgBox(FmtMessage(SetupMessage(msgWinVersionTooLowError), ['Visual C++ 2013 Redistributable (x64)', '12.0']), mbCriticalError, MB_OK, IDOK);
 end;</pre></example>
       </function>    
     </subcategory>
@@ -2062,7 +2075,16 @@ end;</pre>
         <name>VersionToStr</name>
         <prototype>function VersionToStr(const Version: Int64): String;</prototype>
         <description><p>Returns the specified packed version as a string (in "0.0.0.0" format).</p></description>
-        <seealso><p><link topic="isxfunc_PackVersionNumbers">PackVersionNumbers</link><br />
+        <seealso><p><link topic="isxfunc_StrToVersion">StrToVersion</link><br />
+<link topic="isxfunc_UnpackVersionNumbers">UnpackVersionNumbers</link><br />
+<link topic="isxfunc_UnpackVersionComponents">UnpackVersionComponents</link></p></seealso>
+      </function>
+      <function>
+        <name>StrToVersion</name>
+        <prototype>function StrToVersion(const Version: String; var Version: Int64): Boolean;</prototype>
+        <description><p>Returns the specified string (in "0.0.0.0" format) as a packed version. Returns True if successful, False otherwise.</p></description>
+        <seealso><p><link topic="isxfunc_VersionToStr">VersionToStr</link><br />
+<link topic="isxfunc_PackVersionNumbers">PackVersionNumbers</link><br />
 <link topic="isxfunc_PackVersionComponents">PackVersionComponents</link></p></seealso>
       </function>
     </subcategory>

whatsnew.htm

@@ -30,11 +30,16 @@ For conditions of distribution and use, see <a href="https://jrsoftware.org/file
 
 <p><a name="6.1.3"></a><span class="ver">6.1.3-dev </span><span class="date">(?)</span></p>
 <ul>
-  <li>Pascal Scripting change: Added new <tt>ItemFontStyle</tt> and <tt>SubItemFontStyle</tt> properties to the <tt/>TNewCheckListBox</tt> support class. See the <i><a href="https://jrsoftware.github.io/issrc/Examples/CodeClasses.iss">CodeClasses.iss</a></i> example script for an example.</li>
+  <li>Pascal Scripting changes:
+  <ul>
+    <li>Added new <tt>ItemFontStyle</tt> and <tt>SubItemFontStyle</tt> properties to the <tt/>TNewCheckListBox</tt> support class. See the <i><a href="https://jrsoftware.github.io/issrc/Examples/CodeClasses.iss">CodeClasses.iss</a></i> example script for an example.</li>
+    <li>Added new <tt>IsMsiProductInstalled</tt> and <tt>StrToVersion</tt> support functions.</li>
+  </ul>
+  </li>
   <li>Compiler IDE change: <i>Fix:</i> Autocomplete support for event functions listed some procedures as functions.</li>
 </ul>
 
-<p>Contributions via <a href="https://github.com/jrsoftware/issrc" target="_blank">GitHub</a>: <b>Thanks to Sergii Leonov for their contributions.</b></p>
+<p>Contributions via <a href="https://github.com/jrsoftware/issrc" target="_blank">GitHub</a>: <b>Thanks to Sergii Leonov and Dom Gries for their contributions.</b></p>
 
 <p><a name="6.1.2"></a><span class="ver">6.1.2 </span><span class="date">(2020-11-15)</span></p>
 <ul>