HTMLEditor Provider - How to write a custom provider for ASP.NET 2.0

<%@ CodePage=65001 Language="VBScript"%>
<%
Option Explicit
Response.Buffer = True
%>
<!--
 * FCKeditor - The text editor for internet
 * Copyright (C) 2003-2006 Frederico Caldeira Knabben
 * 
 * Licensed under the terms of the GNU Lesser General Public License:
 * 		http://www.opensource.org/licenses/lgpl-license.php
 * 
 * For further information visit:
 * 		http://www.fckeditor.net/
 * 
 * "Support Open Source software. What about a donation today?"
 * 
 * File Name: upload.asp
 * 	This is the "File Uploader" for ASP.
 * 
 * File Authors:
 * 		Frederico Caldeira Knabben (fredck@fckeditor.net)
-->
<!--#include file="config.asp"-->
<!--#include file="io.asp"-->
<!--#include file="class_upload.asp"-->
<%

' This is the function that sends the results of the uploading process.
Function SendResults( errorNumber, fileUrl, fileName, customMsg )
	Response.Write "<script type=""text/javascript"">"
	Response.Write "window.parent.OnUploadCompleted(" & errorNumber & ",""" & Replace( fileUrl, """", "\""" ) & """,""" & Replace( fileName, """", "\""" ) & """,""" & Replace( customMsg , """", "\""" ) & """) ;"
	Response.Write "</script>"
	Response.End
End Function

%>
<%

' Check if this uploader has been enabled.
If ( ConfigIsEnabled = False ) Then
	SendResults "1", "", "", "This file uploader is disabled. Please check the ""editor/filemanager/upload/asp/config.asp"" file"
End If

' The the file type (from the QueryString, by default 'File').
Dim resourceType
If ( Request.QueryString("Type") <> "" ) Then
	resourceType = Request.QueryString("Type")
Else
	resourceType = "File"
End If

' Create the Uploader object.
Dim oUploader
Set oUploader = New NetRube_Upload
oUploader.MaxSize	= 0
oUploader.Allowed	= ConfigAllowedExtensions.Item( resourceType )
oUploader.Denied	= ConfigDeniedExtensions.Item( resourceType )
oUploader.GetData

If oUploader.ErrNum > 1 Then
	SendResults "202", "", "", ""
Else
	Dim sFileName, sFileUrl, sErrorNumber, sOriginalFileName, sExtension
	sFileName		= ""
	sFileUrl		= ""
	sErrorNumber	= "0"

	' Map the virtual path to the local server path.
	Dim sServerDir
	sServerDir = Server.MapPath( ConfigUserFilesPath )
	If ( Right( sServerDir, 1 ) <> "\" ) Then
		sServerDir = sServerDir & "\"
	End If

	Dim oFSO
	Set oFSO = Server.CreateObject( "Scripting.FileSystemObject" )

	' Get the uploaded file name.
	sFileName	= oUploader.File( "NewFile" ).Name
	sExtension	= oUploader.File( "NewFile" ).Ext
	sOriginalFileName = sFileName

	Dim iCounter
	iCounter = 0

	Do While ( True )
		Dim sFilePath
		sFilePath = sServerDir & sFileName

		If ( oFSO.FileExists( sFilePath ) ) Then
			iCounter = iCounter + 1
			sFileName = RemoveExtension( sOriginalFileName ) & "(" & iCounter & ")." & sExtension
			sErrorNumber = "201"
		Else
			oUploader.SaveAs "NewFile", sFilePath
			If oUploader.ErrNum > 0 Then SendResults "202", "", "", ""
			Exit Do
		End If
	Loop
	Response.Write( sFilePath )
	sFileUrl = ConfigUserFilesPath & sFileName

	SendResults sErrorNumber, sFileUrl, sFileName, ""
	
End If

Set oUploader = Nothing
%>