VintaSoft Imaging .NET SDK 14.1: Документация для .NET разработчика
    Кодеки: Как преобразовать DOCX в HTML?
    SDK может преобразовать DOCX-документ в документ HTML.

    Вот код C#/VB.NET, который показывает, как преобразовать DOCX-документ в документ HTML:
    /// <summary>
    /// Converts DOCX file to a HTML file.
    /// </summary>
    /// <param name="docxFilePath">Path to a source DOC file.</param>
    /// <param name="htmlFilePath">Path to a result HTML file.</param>
    public static void ConvertDocxToHtml(string docxFilePath, string htmlFilePath)
    {
        Vintasoft.Imaging.Office.OpenXml.OpenXmlDocumentConverter.ConvertDocxToHtml(docxFilePath, htmlFilePath);
    }
    
    ''' <summary>
    ''' Converts DOCX file to a HTML file.
    ''' </summary>
    ''' <param name="docxFilePath">Path to a source DOC file.</param>
    ''' <param name="htmlFilePath">Path to a result HTML file.</param>
    Public Shared Sub ConvertDocxToHtml(docxFilePath As String, htmlFilePath As String)
        Vintasoft.Imaging.Office.OpenXml.OpenXmlDocumentConverter.ConvertDocxToHtml(docxFilePath, htmlFilePath)
    End Sub