Hi Hilton,

Yes, this is still not implemented, it has a lot of votes, I am sure that it will be implemented in one of the future releases.

 I can suggest a workaround that uses the docx format for the conversion for now: 

private void RadButton_Click(object sender, RoutedEventArgs e)
{
    var rtbProvider = new Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.DocxFormatProvider();
    var wordsProcessingProvider = new Telerik.Windows.Documents.Flow.FormatProviders.Docx.DocxFormatProvider();

    var radDocument = radRichTextBox.Document;

    var docBytes = rtbProvider.Export(radDocument);
    var flowDocument = wordsProcessingProvider.Import(docBytes);
}

Should you have any other questions do not hesitate to ask.

Regards,
Dimitar
Progress Telerik

Hi Peter,

You can implement this scenario using the HtmlFormatProvider of RadRichTextBox. 

In order to use this provider, you need to add a reference to the Telerik.Windows.Documents.FormatProviders.Html assembly and a using directive for the Telerik.Windows.Documents.FormatProviders.Html namespace. 

You might find helpful to check the Import/ Export article of RadRichTextBox for more information about the functionality: http://docs.telerik.com/devtools/wpf/controls/radrichtextbox/import-export/features-import-export

Regards,
Tanya