using DevExpress.XtraRichEdit;
using System.Diagnostics;
using System.Reflection;

using (var wordProcessor = new RichEditDocumentServer())
{
    using (Stream stream = GetResourceStream("MyApplication.Document1.rtf"))
    {
        stream.Seek(0, SeekOrigin.Begin);
        wordProcessor.LoadDocument(stream, DocumentFormat.Rtf);
        stream.Close();
    }

    wordProcessor.SaveDocument("Result.docx", DocumentFormat.Docx);
}

Process.Start(new ProcessStartInfo("explorer.exe", "/select," + "Result.docx") { UseShellExecute = true });

static Stream GetResourceStream(string resourceName)
{
    return Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName);
}

Imports DevExpress.XtraRichEdit
Imports System.Diagnostics
Imports System.Reflection

Using wordProcessor = New RichEditDocumentServer()
    Using stream As Stream = GetResourceStream("MyApplication.Document1.rtf")
        stream.Seek(0, SeekOrigin.Begin)
        wordProcessor.LoadDocument(stream, DocumentFormat.Rtf)
        stream.Close()
    End Using

    wordProcessor.SaveDocument("Result.docx", DocumentFormat.Docx)
End Using

Process.Start(New ProcessStartInfo("explorer.exe", "/select," & "Result.docx") With {.UseShellExecute = True})

Shared Function GetResourceStream(ByVal resourceName As String) As Stream
    Return Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName)
End Function

using DevExpress.XtraRichEdit.Import;
//...

private void RichEditDocumentServer_BeforeImport(object sender, BeforeImportEventArgs e)
{
    if (e.DocumentFormat == DocumentFormat.PlainText)
    {
        //Detect plain text encoding automatically:
        ((PlainTextDocumentImporterOptions)e.Options).AutoDetectEncoding = true;
    }

    if (e.DocumentFormat == DocumentFormat.Doc)
    {
        //Disable loading comments added to removed ranges in DOC documents
        ((DocDocumentImporterOptions)e.Options).KeepCommentsForRemovedRanges = false;
    }

    if (e.DocumentFormat == DocumentFormat.Html)
    {
        //Load images synchronously with HTML documents
        ((HtmlDocumentImporterOptions)e.Options).AsyncImageLoading = false;
    }
}

Imports DevExpress.XtraRichEdit.Import

Private Sub RichEditDocumentServer_BeforeImport(ByVal sender As Object, ByVal e As BeforeImportEventArgs)
    If e.DocumentFormat = DocumentFormat.PlainText Then
        'Detect plain text encoding automatically:
        (CType(e.Options, PlainTextDocumentImporterOptions)).AutoDetectEncoding = True
    End If

    If e.DocumentFormat = DocumentFormat.Doc Then
        'Disable loading comments added to removed ranges in DOC documents
        (CType(e.Options, DocDocumentImporterOptions)).KeepCommentsForRemovedRanges = False
    End If

    If e.DocumentFormat = DocumentFormat.Html Then
        'Load images synchronously with HTML documents
        (CType(e.Options, HtmlDocumentImporterOptions)).AsyncImageLoading = False
    End If
End Sub

private void RichEditDocumentServer_BeforeExport(object sender, BeforeExportEventArgs e)
{
    if (e.DocumentFormat == DocumentFormat.PlainText)
    {
        //Include document fields in the exported plain text:
        PlainTextDocumentExporterOptions plainTextOptions = e.Options as PlainTextDocumentExporterOptions;
        plainTextOptions.ExportHiddenText = true;
        plainTextOptions.FieldCodeEndMarker = ">";
        plainTextOptions.FieldCodeStartMarker = "[<";
        plainTextOptions.FieldResultEndMarker = "]";
    }

    if (e.DocumentFormat == DocumentFormat.Docx)
    {
        //Specify what DOCX document properties to export:
        OpenXmlDocumentExporterOptions docxOptions = e.Options as OpenXmlDocumentExporterOptions;
        docxOptions.ExportedDocumentProperties = DocumentPropertyNames.Title | DocumentPropertyNames.LastModifiedBy | DocumentPropertyNames.Modified;
    }

    if (e.DocumentFormat == DocumentFormat.Html)
    {
        //Specify HTML export options:
        HtmlDocumentExporterOptions htmlOptions = e.Options as HtmlDocumentExporterOptions;
        htmlOptions.EmbedImages = true;
        htmlOptions.CssPropertiesExportType = CssPropertiesExportType.Style;
        htmlOptions.UseFontSubstitution = false;
    }
}

Private Sub RichEditDocumentServer_BeforeExport(ByVal sender As Object, ByVal e As BeforeExportEventArgs)
    If e.DocumentFormat = DocumentFormat.PlainText Then
        'Include document fields in the exported plain text:
        Dim plainTextOptions As PlainTextDocumentExporterOptions = TryCast(e.Options, PlainTextDocumentExporterOptions)
        plainTextOptions.ExportHiddenText = True
        plainTextOptions.FieldCodeEndMarker = ">"
        plainTextOptions.FieldCodeStartMarker = "[<"
        plainTextOptions.FieldResultEndMarker = "]"
    End If

    If e.DocumentFormat = DocumentFormat.Docx Then
        'Specify what DOCX document properties to export:
        Dim docxOptions As OpenXmlDocumentExporterOptions = TryCast(e.Options, OpenXmlDocumentExporterOptions)
        docxOptions.ExportedDocumentProperties = DocumentPropertyNames.Title Or DocumentPropertyNames.LastModifiedBy Or DocumentPropertyNames.Modified
    End If

    If e.DocumentFormat = DocumentFormat.Html Then
        'Specify HTML export options:
        Dim htmlOptions As HtmlDocumentExporterOptions = TryCast(e.Options, HtmlDocumentExporterOptions)
        htmlOptions.EmbedImages = True
        htmlOptions.CssPropertiesExportType = CssPropertiesExportType.Style
        htmlOptions.UseFontSubstitution = False
    End If
End Sub

static void RichEditDocumentServer_BeforeImport(object sender, BeforeImportEventArgs e) {
    var wordProcessor = sender as RichEditDocumentServer;

    DocumentCapabilitiesOptions capabilityOptions = wordProcessor.Options.DocumentCapabilities;
    capabilityOptions.CharacterFormatting = DocumentCapability.Disabled;
    capabilityOptions.Comments = DocumentCapability.Disabled;
    capabilityOptions.InlineShapes = DocumentCapability.Disabled;
}

Shared Sub RichEditDocumentServer_BeforeImport(ByVal sender As Object, ByVal e As BeforeImportEventArgs)
    Dim wordProcessor = TryCast(sender, RichEditDocumentServer)

    Dim capabilityOptions As DocumentCapabilitiesOptions = wordProcessor.Options.DocumentCapabilities
    capabilityOptions.CharacterFormatting = DocumentCapability.Disabled
    capabilityOptions.Comments = DocumentCapability.Disabled
    capabilityOptions.InlineShapes = DocumentCapability.Disabled
End Sub