Added old console sample to test diy message pump.

NTwain.sln

@@ -28,6 +28,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WinForm64", "samples\WinFor
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "csizes", "csizes\csizes.vcxproj", "{1AABD2DC-3F81-4301-938B-3EC2EDEF38D4}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WinConsole32", "samples\WinConsole32\WinConsole32.csproj", "{4E2417E7-FDC3-46D7-B976-84A97B500B74}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -86,6 +88,18 @@ Global
 		{1AABD2DC-3F81-4301-938B-3EC2EDEF38D4}.Release|x64.Build.0 = Release|x64
 		{1AABD2DC-3F81-4301-938B-3EC2EDEF38D4}.Release|x86.ActiveCfg = Release|Win32
 		{1AABD2DC-3F81-4301-938B-3EC2EDEF38D4}.Release|x86.Build.0 = Release|Win32
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Debug|x64.Build.0 = Debug|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Debug|x86.Build.0 = Debug|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Release|x64.ActiveCfg = Release|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Release|x64.Build.0 = Release|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Release|x86.ActiveCfg = Release|Any CPU
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -93,6 +107,7 @@ Global
 	GlobalSection(NestedProjects) = preSolution
 		{7792A94E-D0B4-440D-8BD5-CA1CA548782C} = {707B4313-8EF8-4D0F-A95E-590783422187}
 		{C9666CB2-C9A6-48C8-AB51-D616A48058A7} = {707B4313-8EF8-4D0F-A95E-590783422187}
+		{4E2417E7-FDC3-46D7-B976-84A97B500B74} = {707B4313-8EF8-4D0F-A95E-590783422187}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {7459323B-44F6-4E07-8574-E1B4B525086B}

README.md

@@ -37,10 +37,6 @@ names and the spec pdf.
 
 * All lower-level TWAIN APIs are public instead of hidden away.
 
-* `TwainAppSession` longer hosts its own internal message pump. Apps will need to hook 
-into their UI message loop on Windows (supports Winform and WPF at the moment).
-
-
 ## Using the lib
 
 Before using this lib, you are required to be reasonably 

samples/WinConsole32/Program.cs

@@ -0,0 +1,106 @@
+using NTwain;
+using NTwain.Data;
+using System.Diagnostics;
+
+namespace WinConsole32
+{
+  internal class Program
+  {
+    static async Task Main(string[] args)
+    {
+      var libVer = FileVersionInfo.GetVersionInfo(typeof(TwainAppSession).Assembly.Location).ProductVersion;
+      Console.WriteLine($"Console sample {(TWPlatform.Is32bit ? " 32bit" : " 64bit")} on NTwain {libVer}");
+
+      MessagePumpThread pump = new MessagePumpThread();
+      TwainAppSession session = new TwainAppSession(Environment.ProcessPath!);
+
+      session.StateChanged += Session_StateChanged;
+      session.SourceDisabled += Session_SourceDisabled1;
+      session.Transferred += Session_Transferred;
+
+      var sts = await pump.AttachAsync(session);
+
+      if (sts.IsSuccess)
+      {
+        Console.WriteLine("Available data sources:");
+
+        TW_IDENTITY_LEGACY firstSrc = default;
+        foreach (var src in session.GetSources())
+        {
+          if (!firstSrc.HasValue) firstSrc = src;
+          Console.WriteLine($"\t{src}");
+        }
+        Console.WriteLine();
+
+        var defaultSrc = session.DefaultSource;
+        Console.WriteLine($"Default data source = {defaultSrc}");
+        Console.WriteLine();
+
+        session.ShowUserSelect();
+        Console.WriteLine($"Selected data source = {session.DefaultSource}");
+        Console.WriteLine();
+
+        var targetSrc = defaultSrc.HasValue ? defaultSrc : firstSrc;
+
+        if (targetSrc.HasValue)
+        {
+          TestThisSource(session, targetSrc);
+        }
+        else
+        {
+          Console.WriteLine("No data source to test.");
+          Console.WriteLine();
+        }
+
+        Console.WriteLine("---------------------------------------------");
+        Console.WriteLine("Test in progress, press Enter to stop testing");
+        Console.WriteLine("---------------------------------------------");
+        Console.ReadLine();
+        session.TryStepdown(STATE.S1);
+      }
+      else
+      {
+        Console.WriteLine("Failed to attach: " + sts);
+      }
+
+      Console.WriteLine("-------------------");
+      Console.WriteLine("Press Enter to exit");
+      Console.WriteLine("-------------------");
+      Console.ReadLine();
+    }
+
+    private static void Session_Transferred(TwainAppSession sender, TransferredEventArgs e)
+    {
+      if (e.Data != null)
+      {
+        Console.WriteLine("SUCCESS! Got twain data on thread {0}.", Environment.CurrentManagedThreadId);
+      }
+      else
+      {
+        Console.WriteLine("BUMMER! No twain data on thread {0}.", Environment.CurrentManagedThreadId);
+      }
+      e.Dispose();
+    }
+
+    private static void Session_StateChanged(TwainAppSession sender, STATE e)
+    {
+      Console.WriteLine($"Session state changed to {sender.State}");
+    }
+
+    private static void Session_SourceDisabled1(TwainAppSession sender, TW_IDENTITY_LEGACY e)
+    {
+      Console.WriteLine($"Session source disabled.");
+      sender.CloseSource();
+    }
+
+    private static void TestThisSource(TwainAppSession session, TW_IDENTITY_LEGACY source)
+    {
+      Console.WriteLine($"Testing data source {source}");
+      Console.WriteLine();
+
+      session.OpenSource(source);
+
+      var rc = session.EnableSource(true, false);
+    }
+  }
+}

samples/WinConsole32/WinConsole32.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0-windows</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <PlatformTarget>x86</PlatformTarget>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\NTwain\NTwain.csproj" />
+  </ItemGroup>
+
+</Project>