diff --git a/Contrib/nsDialogs/Readme.html b/Contrib/nsDialogs/Readme.html
index 3fa53f44..a41a3f12 100644
--- a/Contrib/nsDialogs/Readme.html
+++ b/Contrib/nsDialogs/Readme.html
@@ -617,7 +617,7 @@ SectionEnd</pre></blockquote>
 
 <h3><a name="mref-onback"></a>NSD_OnBack</h3>
 
-<p><code>${NSD_OnBack} <i>function_address</i></code></p>
+<p><code>${NSD_OnBack} <i>control_HWND</i> <i>function_address</i></code></p>
 
 <p>See <a href="#ref-onback">OnBack</a> for more details.</p>
 
@@ -625,7 +625,7 @@ SectionEnd</pre></blockquote>
 
 <h3><a name="mref-onchange"></a>NSD_OnChange</h3>
 
-<p><code>${NSD_OnChange} <i>function_address</i></code></p>
+<p><code>${NSD_OnChange} <i>control_HWND</i> <i>function_address</i></code></p>
 
 <p>See <a href="#ref-onchange">OnChange</a> for more details.</p>
 
@@ -633,13 +633,13 @@ SectionEnd</pre></blockquote>
 
 <h3><a name="mref-onclick"></a>NSD_OnClick</h3>
 
-<p><code>${NSD_OnClick} <i>function_address</i></code></p>
+<p><code>${NSD_OnClick} <i>control_HWND</i> <i>function_address</i></code></p>
 
 <p>See <a href="#ref-onclick">OnClick</a> for more details.</p>
 
 <h3><a name="mref-onnotify"></a>NSD_OnNotify</h3>
 
-<p><code>${NSD_OnNotify} <i>function_address</i></code></p>
+<p><code>${NSD_OnNotify} <i>control_HWND</i> <i>function_address</i></code></p>
 
 <p>See <a href="#ref-onnotify">OnNotify</a> for more details.</p>