From 844f84e2593899de5cdbebf7aaf610e659f36432 Mon Sep 17 00:00:00 2001
From: soukoku <yinchun.wang@gmail.com>
Date: Sat, 3 Jan 2015 11:29:38 -0500
Subject: [PATCH] Some comments.

---
 NTwain/Internals/TransferLogic.cs | 4 ++--
 NTwain/TwainSessionInternal.cs    | 4 +++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/NTwain/Internals/TransferLogic.cs b/NTwain/Internals/TransferLogic.cs
index 54a5069..3595a99 100644
--- a/NTwain/Internals/TransferLogic.cs
+++ b/NTwain/Internals/TransferLogic.cs
@@ -20,8 +20,8 @@ namespace NTwain.Internals
         public static void DoTransferRoutine(ITwainSessionInternal session)
         {
             var pending = new TWPendingXfers();
-            var rc = ReturnCode.Success;
-
+            //var rc = ReturnCode.Success;
+            var rc = session.DGControl.PendingXfers.Get(pending);
             do
             {
                 #region build and raise xfer ready
diff --git a/NTwain/TwainSessionInternal.cs b/NTwain/TwainSessionInternal.cs
index 91ba38e..36fcd59 100644
--- a/NTwain/TwainSessionInternal.cs
+++ b/NTwain/TwainSessionInternal.cs
@@ -210,7 +210,7 @@ namespace NTwain
         #region IWinMessageFilter Members
 
         /// <summary>
-        /// Checks and handle the message if it's a TWAIN message.
+        /// Checks and handles the message if it's a TWAIN message.
         /// </summary>
         /// <param name="hwnd">The window handle.</param>
         /// <param name="msg">The message.</param>
@@ -265,6 +265,8 @@ namespace NTwain
                 // spec says we must handle this on the thread that enabled the DS.
                 // by using the internal dispatcher this will be the case.
 
+                // In any event the trick to get this thing working is to return from the callback first
+                // before trying to process the msg or there will be unpredictable errors.
                 _msgLoopHook.BeginInvoke(() =>
                 {
                     HandleSourceMsg(msg);