public virtual void ExportToPdf(
    Stream stream,
    PdfExportOptions pdfExportOptions
)

Public Overridable Sub ExportToPdf(
    stream As Stream,
    pdfExportOptions As PdfExportOptions
)

using DevExpress.XtraRichEdit;
using DevExpress.XtraPrinting;
using System.IO;
//...

using (RichEditDocumentServer wordProcessor = new RichEditDocumentServer())
{
    // Load a DOCX document.
    wordProcessor.LoadDocument("Documents\\MovieRentals.docx");

    // Specify export options.
    PdfExportOptions options = new PdfExportOptions();
    options.DocumentOptions.Author = "Mark Jones";
    options.Compressed = false;
    options.ImageQuality = PdfJpegImageQuality.Highest;

    // Export the document to a stream.
    using (FileStream pdfFileStream = new FileStream("Document_PDF.pdf", FileMode.Create))
    {
        wordProcessor.ExportToPdf(pdfFileStream, options);
    }
}

Imports DevExpress.XtraRichEdit
Imports DevExpress.XtraPrinting
Imports System.IO
'...

Using wordProcessor As New RichEditDocumentServer()
    ' Load a DOCX document.
    wordProcessor.LoadDocument("Documents\MovieRentals.docx")

    ' Specify export options.
    Dim options As New PdfExportOptions()
    options.DocumentOptions.Author = "Mark Jones"
    options.Compressed = False
    options.ImageQuality = PdfJpegImageQuality.Highest

    ' Export the document to a stream.
    Using pdfFileStream As New FileStream("Document_PDF.pdf", FileMode.Create)
        wordProcessor.ExportToPdf(pdfFileStream, options)
    End Using
End Using

{
    wordProcessor.ExportToPdf(pdfFileStream, options);
}

PdfExportOptions pdfExportOptions = SharedHelper.GetOptions(format);
server.ExportToPdf(resultStream, pdfExportOptions);

Using pdfFileStream As System.IO.FileStream = New System.IO.FileStream("Document_PDF.pdf", System.IO.FileMode.Create)
    wordProcessor.ExportToPdf(pdfFileStream, options)
End Using