diff --git a/README.md b/README.md
index ba73352..1af6646 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # TWAIN Application-Side Library
 
+Note: This was migrated from [https://bitbucket.org/soukoku/ntwain/](https://bitbucket.org/soukoku/ntwain/) for v4 dev.
+
 ## Info
 This is a library created to make working with [TWAIN](http://twain.org/) interface possible in dotnet. 
 This project has these features/goals:
diff --git a/src/NTwain/Data/TwainTypes.cs b/src/NTwain/Data/TwainTypes.cs
index fba5a4f..28cedeb 100644
--- a/src/NTwain/Data/TwainTypes.cs
+++ b/src/NTwain/Data/TwainTypes.cs
@@ -443,8 +443,8 @@ partial class TWSetupMemXfer
     [StructLayout(LayoutKind.Sequential, Pack = 2)]
     partial class TWStatus
     {
-        TW_UINT16 _conditionCode;
-        TW_UINT16 _data;
+        internal TW_UINT16 _conditionCode;
+        internal TW_UINT16 _data;
     }
 
     [StructLayout(LayoutKind.Sequential, Pack = 2)]
diff --git a/src/NTwain/Data/TwainTypesExtended.cs b/src/NTwain/Data/TwainTypesExtended.cs
index 0289c99..a1e5cc7 100644
--- a/src/NTwain/Data/TwainTypesExtended.cs
+++ b/src/NTwain/Data/TwainTypesExtended.cs
@@ -2301,6 +2301,11 @@ public sealed partial class TWStatusUtf8 : IDisposable
         public TWStatus Status
         {
             get { return new TWStatus(_conditionCode, _data); }
+            internal set
+            {
+                _conditionCode = value._conditionCode;
+                _data = value._data;
+            }
         }
 
         /// <summary>
diff --git a/src/NTwain/DataSource.cs b/src/NTwain/DataSource.cs
index 17b183e..d9aff4a 100644
--- a/src/NTwain/DataSource.cs
+++ b/src/NTwain/DataSource.cs
@@ -88,13 +88,14 @@ public TWStatus GetStatus()
             return stat;
         }
         /// <summary>
-        /// Gets the source status. Only call this at state 4 or higher.
+        /// Gets the source status string. Only call this at state 4 or higher.
         /// </summary>
+        /// <param name="status">Status from previous calls.</param>
         /// <returns></returns>
-        public TWStatusUtf8 GetStatusUtf8()
+        public TWStatusUtf8 GetStatusUtf8(TWStatus status)
         {
             TWStatusUtf8 stat;
-            _session.DGControl.StatusUtf8.GetSource(out stat);
+            _session.DGControl.StatusUtf8.GetSource(status, out stat);
             return stat;
         }
 
@@ -178,30 +179,27 @@ public byte[] Settings
             get
             {
                 byte[] value = null;
-                if (Capabilities.CapCustomDSData.GetCurrent() == BoolType.True)
+
+                TWCustomDSData data;
+                if (DGControl.CustomDSData.Get(out data) == ReturnCode.Success && data.InfoLength > 0)
                 {
-                    TWCustomDSData data;
-                    if (DGControl.CustomDSData.Get(out data) == ReturnCode.Success && data.InfoLength > 0)
+                    try
                     {
-                        try
-                        {
-                            value = new byte[data.InfoLength];
-                            var ptr = PlatformInfo.Current.MemoryManager.Lock(data.hData);
-                            Marshal.Copy(ptr, value, 0, (int)data.InfoLength);
-                        }
-                        finally
-                        {
-                            PlatformInfo.Current.MemoryManager.Unlock(data.hData);
-                            PlatformInfo.Current.MemoryManager.Free(data.hData);
-                        }
+                        value = new byte[data.InfoLength];
+                        var ptr = PlatformInfo.Current.MemoryManager.Lock(data.hData);
+                        Marshal.Copy(ptr, value, 0, (int)data.InfoLength);
+                    }
+                    finally
+                    {
+                        PlatformInfo.Current.MemoryManager.Unlock(data.hData);
+                        PlatformInfo.Current.MemoryManager.Free(data.hData);
                     }
                 }
                 return value;
             }
             set
             {
-                if (value != null && value.Length > 0 &&
-                    Capabilities.CapCustomDSData.GetCurrent() == BoolType.True)
+                if (value != null && value.Length > 0)
                 {
                     TWCustomDSData data = new TWCustomDSData
                     {
diff --git a/src/NTwain/IDataSource.cs b/src/NTwain/IDataSource.cs
index eee29be..c58c4e1 100644
--- a/src/NTwain/IDataSource.cs
+++ b/src/NTwain/IDataSource.cs
@@ -116,9 +116,10 @@ public interface IDataSource : ITripletControl
         TWStatus GetStatus();
 
         /// <summary>
-        /// Gets the source status. Only call this at state 4 or higher.
+        /// Gets the source status string. Only call this at state 4 or higher.
         /// </summary>
+        /// <param name="status">Status from previous calls.</param>
         /// <returns></returns>
-        TWStatusUtf8 GetStatusUtf8();
+        TWStatusUtf8 GetStatusUtf8(TWStatus status);
     }
 }
diff --git a/src/NTwain/ITwainSession.cs b/src/NTwain/ITwainSession.cs
index a1ec498..54abcfc 100644
--- a/src/NTwain/ITwainSession.cs
+++ b/src/NTwain/ITwainSession.cs
@@ -168,10 +168,11 @@ public interface ITwainSession : IEnumerable<DataSource>, INotifyPropertyChanged
         TWStatus GetStatus();
 
         /// <summary>
-        /// Gets the manager status. Only call this at state 3 or higher.
+        /// Gets the manager status string. Only call this at state 3 or higher.
         /// </summary>
+        /// <param name="status">Status from previous calls.</param>
         /// <returns></returns>
-        TWStatusUtf8 GetStatusUtf8();
+        TWStatusUtf8 GetStatusUtf8(TWStatus status);
 
 
         /// <summary>
diff --git a/src/NTwain/Properties/VersionInfo.cs b/src/NTwain/Properties/VersionInfo.cs
index d3c0256..b6415e7 100644
--- a/src/NTwain/Properties/VersionInfo.cs
+++ b/src/NTwain/Properties/VersionInfo.cs
@@ -23,7 +23,7 @@ static class VersionInfo
         /// <summary>
         /// The build release version number.
         /// </summary>
-        public const string Build = "3.5.3"; // change this for each nuget release
+        public const string Build = "3.6.0"; // change this for each nuget release
 
 
     }
diff --git a/src/NTwain/Triplets/DGAudio/DGAudio.AudioFileXfer.cs b/src/NTwain/Triplets/DGAudio/DGAudio.AudioFileXfer.cs
index b594cf4..161caf5 100644
--- a/src/NTwain/Triplets/DGAudio/DGAudio.AudioFileXfer.cs
+++ b/src/NTwain/Triplets/DGAudio/DGAudio.AudioFileXfer.cs
@@ -19,7 +19,8 @@ public ReturnCode Get()
 		{
 			Session.VerifyState(6, 6, DataGroups.Audio, DataArgumentType.AudioFileXfer, Message.Get);
 			IntPtr z = IntPtr.Zero;
-			return Dsm.DsmEntry(Session.AppId, Session.CurrentSource.Identity, DataGroups.Audio, DataArgumentType.AudioFileXfer, Message.Get, ref z);
+			return Dsm.DsmEntry(Session.AppId, Session.CurrentSource.Identity, 
+                DataGroups.Audio, DataArgumentType.AudioFileXfer, Message.Get, ref z);
 		}
 	}
 }
\ No newline at end of file
diff --git a/src/NTwain/Triplets/DGAudio/DGAudio.AudioNativeXfer.cs b/src/NTwain/Triplets/DGAudio/DGAudio.AudioNativeXfer.cs
index e562343..4eae74a 100644
--- a/src/NTwain/Triplets/DGAudio/DGAudio.AudioNativeXfer.cs
+++ b/src/NTwain/Triplets/DGAudio/DGAudio.AudioNativeXfer.cs
@@ -22,7 +22,8 @@ internal AudioNativeXfer(ITwainSessionInternal session) : base(session) { }
 		public ReturnCode Get(ref IntPtr handle)
 		{
 			Session.VerifyState(6, 6, DataGroups.Audio, DataArgumentType.AudioNativeXfer, Message.Get);
-			return Dsm.DsmEntry(Session.AppId, Session.CurrentSource.Identity, DataGroups.Audio, DataArgumentType.AudioNativeXfer, Message.Get, ref handle);
+			return Dsm.DsmEntry(Session.AppId, Session.CurrentSource.Identity, 
+                DataGroups.Audio, DataArgumentType.AudioNativeXfer, Message.Get, ref handle);
 		}
 	}
 }
\ No newline at end of file
diff --git a/src/NTwain/Triplets/DGControl/DGControl.StatusUtf8.cs b/src/NTwain/Triplets/DGControl/DGControl.StatusUtf8.cs
index 372327b..8f1f985 100644
--- a/src/NTwain/Triplets/DGControl/DGControl.StatusUtf8.cs
+++ b/src/NTwain/Triplets/DGControl/DGControl.StatusUtf8.cs
@@ -16,9 +16,9 @@ internal StatusUtf8(ITwainSessionInternal session) : base(session) { }
         /// </summary>
         /// <param name="status">The status.</param>
         /// <returns></returns>
-        public ReturnCode GetManager(out TWStatusUtf8 status)
+        public ReturnCode GetManager(TWStatus status, out TWStatusUtf8 utf8status)
         {
-            status = new TWStatusUtf8();
+            utf8status = new TWStatusUtf8 { Status = status };
             Session.VerifyState(3, 7, DataGroups.Control, DataArgumentType.StatusUtf8, Message.Get);
             return Dsm.DsmEntry(Session.AppId, null, Message.Get, status);
         }
@@ -29,9 +29,9 @@ public ReturnCode GetManager(out TWStatusUtf8 status)
 		/// </summary>
 		/// <param name="status">The status.</param>
 		/// <returns></returns>
-		public ReturnCode GetSource(out TWStatusUtf8 status)
+		public ReturnCode GetSource(TWStatus status, out TWStatusUtf8 utf8status)
 		{
-            status = new TWStatusUtf8();
+            utf8status = new TWStatusUtf8 { Status = status };
 			Session.VerifyState(3, 7, DataGroups.Control, DataArgumentType.StatusUtf8, Message.Get);
 			return Dsm.DsmEntry(Session.AppId, Session.CurrentSource.Identity, Message.Get, status);
 		}
diff --git a/src/NTwain/Triplets/DGCustom.cs b/src/NTwain/Triplets/DGCustom.cs
index 1d5d320..1af0101 100644
--- a/src/NTwain/Triplets/DGCustom.cs
+++ b/src/NTwain/Triplets/DGCustom.cs
@@ -39,6 +39,24 @@ public ReturnCode DsmEntry(
             return Dsm.DsmEntry(_session.AppId, _session.CurrentSource.Identity, group, dat, message, ref data);
         }
 
+
+        /// <summary>
+        /// Direct DSM_Entry call with full arguments for custom values.
+        /// </summary>
+        /// <param name="group">The group.</param>
+        /// <param name="dat">The dat.</param>
+        /// <param name="message">The message.</param>
+        /// <param name="data">The data.</param>
+        /// <returns></returns>
+        public ReturnCode DsmEntry(
+            DataGroups group,
+            DataArgumentType dat,
+            Message message,
+            IntPtr data)
+        {
+            _session.VerifyState(3, 7, group, dat, message);
+            return Dsm.DsmEntry(_session.AppId, _session.CurrentSource.Identity, group, dat, message, data);
+        }
         // todo: add other data value types?
     }
 }
diff --git a/src/NTwain/Triplets/Dsm.Linux.cs b/src/NTwain/Triplets/Dsm.Linux.cs
index 68b0355..7828f36 100644
--- a/src/NTwain/Triplets/Dsm.Linux.cs
+++ b/src/NTwain/Triplets/Dsm.Linux.cs
@@ -18,6 +18,15 @@ public static extern ReturnCode DsmLinux(
                 Message msg,
                 ref IntPtr data);
 
+            [DllImport(LINUX_DSM_PATH, EntryPoint = DSM_ENTRY)]
+            public static extern ReturnCode DsmLinux(
+                [In, Out]TWIdentity origin,
+                [In, Out]TWIdentity destination,
+                DataGroups dg,
+                DataArgumentType dat,
+                Message msg,
+                IntPtr data);
+
             [DllImport(LINUX_DSM_PATH, EntryPoint = DSM_ENTRY)]
             public static extern ReturnCode DsmLinux(
                 [In, Out]TWIdentity origin,
diff --git a/src/NTwain/Triplets/Dsm.WinNew.cs b/src/NTwain/Triplets/Dsm.WinNew.cs
index 0c87b72..a3adb77 100644
--- a/src/NTwain/Triplets/Dsm.WinNew.cs
+++ b/src/NTwain/Triplets/Dsm.WinNew.cs
@@ -17,6 +17,15 @@ public static extern ReturnCode DsmWinNew(
                 Message msg,
                 ref IntPtr data);
 
+            [DllImport(WIN_NEW_DSM_NAME, EntryPoint = DSM_ENTRY)]
+            public static extern ReturnCode DsmWinNew(
+                [In, Out]TWIdentity origin,
+                [In, Out]TWIdentity destination,
+                DataGroups dg,
+                DataArgumentType dat,
+                Message msg,
+                IntPtr data);
+
             [DllImport(WIN_NEW_DSM_NAME, EntryPoint = DSM_ENTRY)]
             public static extern ReturnCode DsmWinNew(
                 [In, Out]TWIdentity origin,
diff --git a/src/NTwain/Triplets/Dsm.WinOld.cs b/src/NTwain/Triplets/Dsm.WinOld.cs
index fabf125..9ae55b3 100644
--- a/src/NTwain/Triplets/Dsm.WinOld.cs
+++ b/src/NTwain/Triplets/Dsm.WinOld.cs
@@ -17,6 +17,15 @@ public static extern ReturnCode DsmWinOld(
                 Message msg,
                 ref IntPtr data);
 
+            [DllImport(WIN_OLD_DSM_NAME, EntryPoint = DSM_ENTRY)]
+            public static extern ReturnCode DsmWinOld(
+                [In, Out]TWIdentity origin,
+                [In, Out]TWIdentity destination,
+                DataGroups dg,
+                DataArgumentType dat,
+                Message msg,
+                IntPtr data);
+
             [DllImport(WIN_OLD_DSM_NAME, EntryPoint = DSM_ENTRY)]
             public static extern ReturnCode DsmWinOld(
                 [In, Out]TWIdentity origin,
diff --git a/src/NTwain/Triplets/Dsm.cs b/src/NTwain/Triplets/Dsm.cs
index 8425f33..6cc8245 100644
--- a/src/NTwain/Triplets/Dsm.cs
+++ b/src/NTwain/Triplets/Dsm.cs
@@ -37,6 +37,26 @@ public static ReturnCode DsmEntry(
             throw new PlatformNotSupportedException();
         }
 
+        public static ReturnCode DsmEntry(
+            TWIdentity origin,
+            TWIdentity destination,
+            DataGroups dg,
+            DataArgumentType dat,
+            Message msg,
+            IntPtr data)
+        {
+            if (PlatformInfo.Current.IsWindows)
+            {
+                if (PlatformInfo.Current.UseNewWinDSM) { return NativeMethods.DsmWinNew(origin, destination, dg, dat, msg, data); }
+                else { return NativeMethods.DsmWinOld(origin, destination, dg, dat, msg, data); }
+            }
+            else if (PlatformInfo.Current.IsLinux)
+            {
+                return NativeMethods.DsmLinux(origin, destination, dg, dat, msg, data);
+            }
+            throw new PlatformNotSupportedException();
+        }
+
         public static ReturnCode DsmEntry(
             TWIdentity origin,
             TWIdentity destination,
@@ -161,12 +181,12 @@ public static ReturnCode DsmEntry(
         {
             if (PlatformInfo.Current.IsWindows)
             {
-                if (PlatformInfo.Current.UseNewWinDSM) { return NativeMethods.DsmWinNew(origin, destination, DataGroups.Control, DataArgumentType.Callback, msg, data); }
-                else { return NativeMethods.DsmWinOld(origin, destination, DataGroups.Control, DataArgumentType.Callback, msg, data); }
+                if (PlatformInfo.Current.UseNewWinDSM) { return NativeMethods.DsmWinNew(origin, destination, DataGroups.Control, DataArgumentType.Callback2, msg, data); }
+                else { return NativeMethods.DsmWinOld(origin, destination, DataGroups.Control, DataArgumentType.Callback2, msg, data); }
             }
             else if (PlatformInfo.Current.IsLinux)
             {
-                return NativeMethods.DsmLinux(origin, destination, DataGroups.Control, DataArgumentType.Callback, msg, data);
+                return NativeMethods.DsmLinux(origin, destination, DataGroups.Control, DataArgumentType.Callback2, msg, data);
             }
             throw new PlatformNotSupportedException();
         }
diff --git a/src/NTwain/TwainSession.cs b/src/NTwain/TwainSession.cs
index c2d7005..f71af1e 100644
--- a/src/NTwain/TwainSession.cs
+++ b/src/NTwain/TwainSession.cs
@@ -78,6 +78,17 @@ DataSource GetSourceInstance(ITwainSessionInternal session, TWIdentity sourceId)
         #region ITwainSession Members
 
 
+        DGCustom _dgCustom;
+        DGCustom ITripletControl.DGCustom { get { return DGCustom; } }
+        public DGCustom DGCustom
+        {
+            get
+            {
+                if (_dgCustom == null) { _dgCustom = new DGCustom(this); }
+                return _dgCustom;
+            }
+        }
+
         /// <summary>
         /// Gets or sets a value indicating whether calls to triplets will verify the current twain session state.
         /// </summary>
@@ -362,13 +373,14 @@ public TWStatus GetStatus()
         }
 
         /// <summary>
-        /// Gets the manager status. Only call this at state 3 or higher.
+        /// Gets the manager status string. Only call this at state 3 or higher.
         /// </summary>
+        /// <param name="status">Status from previous calls.</param>
         /// <returns></returns>
-        public TWStatusUtf8 GetStatusUtf8()
+        public TWStatusUtf8 GetStatusUtf8(TWStatus status)
         {
             TWStatusUtf8 stat;
-            ((ITwainSessionInternal)this).DGControl.StatusUtf8.GetManager(out stat);
+            ((ITwainSessionInternal)this).DGControl.StatusUtf8.GetManager(status, out stat);
             return stat;
         }
 
diff --git a/src/NTwain/TwainSessionInternal.cs b/src/NTwain/TwainSessionInternal.cs
index 2d80645..e20876b 100644
--- a/src/NTwain/TwainSessionInternal.cs
+++ b/src/NTwain/TwainSessionInternal.cs
@@ -138,17 +138,6 @@ protected DGImage DGImage
             }
         }
 
-        DGCustom _dgCustom;
-        DGCustom ITripletControl.DGCustom { get { return DGCustom; } }
-        protected DGCustom DGCustom
-        {
-            get
-            {
-                if (_dgCustom == null) { _dgCustom = new DGCustom(this); }
-                return _dgCustom;
-            }
-        }
-
 
         /// <summary>
         /// Enables the source to start transferring.