Source of this issue : https://bugreports.qt.nokia.com/browse/QTWEBSITE-378

The documentation page http://developer.qt.nokia.com/doc/qt-4.7/activeqt-dotnet.html contains several errors:

There seems to be some garbage text and/or XML artifacts. See the screenshot for the details.

The link to QtWinForms Solution is broken, it points to http://qt.nokia.com/products/add-on-products/catalog/4/Windows/qtwinforms/ - it seems that this solution/add-on isn't available anymore at all.

This page is generated from ditaxml and ditaxml contains

activeqt-dotnet.xml

 
&lt;!-- <p>The .NET framework provides Platform Invocation Services - P/Invoke - that enable managed code to call native C (not C++) functions located in DLLs directly. The resulting application then becomes partially unmanaged.</p>--&gt;

Please change

 &lt;  to <  

and

 > to  >  

Also fix link :

The link to QtWinForms Solution is broken, it points to http://qt.nokia.com/products/add-on-products/catalog/4/Windows/qtwinforms/ - it seems that this solution/add-on isn't available anymore at all.