Here's some example ASP.NET VB.NET code that will allow you to use NFOP to push the generated PDF out to a browser.
<%@ Import Namespace="System.IO" %> <%@ Import Namespace="System.Xml" %> <%@ Import Namespace="System.Xml.Xsl" %> <%@ Import Namespace="ApacheFop" %> <script LANGUAGE="VB" runat="server"> Public Class CVPDFMaker Public Shared Sub MakePdf(xml as string, xsl as string, pdf as string) Try Dim objFOStream As New StringWriter() Dim objDoc As New XmlDocument() objDoc.Load(xml) Dim objTransform As New XslTransform() objTransform.Load(xsl) objTransform.Transform(objDoc, Nothing, objFOStream) Dim eng As New Engine() '' using NFop Dim spdf As SByte() spdf = eng.Run(objFOStream.ToString()) Dim intLength As Integer = spdf.Length Dim fs As New FileStream(pdf, FileMode.Create, FileAccess.Write) Dim binWriter As New BinaryWriter(fs) For intLength = 0 To (intLength - 1) binWriter.Write(spdf(intLength)) Next fs.Close() binWriter.Close() Catch objException As Exception '' something's gone wrong End Try End Sub End Class </script>