Add attempt to enable ds.

NTwain/TwainSession.cs

@@ -153,6 +153,7 @@ namespace NTwain
 
         /// <summary>
         /// Closes the TWAIN data source manager.
+        /// This is called when <see cref="Dispose"/> is invoked.
         /// </summary>
         public void Close()
         {
@@ -284,6 +285,31 @@ namespace NTwain
             }
         }
 
+        /// <summary>
+        /// Attempts to show the current device's settings dialog if supported.
+        /// </summary>
+        /// <returns></returns>
+        public STS ShowSettings()
+        {
+            TW_USERINTERFACE ui = default;
+            ui.hParent = _hWnd;
+            ui.ShowUI = 1;
+            return _twain.DatUserinterface(DG.CONTROL, MSG.ENABLEDSUIONLY, ref ui);
+        }
+
+        /// <summary>
+        /// Begins the capture process on the current device.
+        /// </summary>
+        /// <param name="showUI">Whether to display settings UI. Not all devices support this.</param>
+        /// <returns></returns>
+        public STS StartCapture(bool showUI)
+        {
+            TW_USERINTERFACE ui = default;
+            ui.hParent = _hWnd;
+            ui.ShowUI = (ushort)(showUI ? 1 : 0);
+            return _twain.DatUserinterface(DG.CONTROL, MSG.ENABLEDS, ref ui);
+        }
+
         #endregion
     }
 }

samples/Net5Console/Net5Console.csproj

@@ -1,8 +1,9 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net5.0-windows</TargetFramework>
+    <!--<PlatformTarget>x86</PlatformTarget>-->
   </PropertyGroup>
 
   <ItemGroup>

samples/Net5Console/Program.cs

@@ -1,6 +1,8 @@
 using NTwain;
 using System;
 using System.Reflection;
+using System.Threading;
+using TWAINWorkingGroup;
 
 namespace Net5Console
 {
@@ -8,23 +10,71 @@ namespace Net5Console
     {
         static void Main(string[] args)
         {
+            Console.WriteLine("Starting twain test in console...");
+
             using (var twain = new TwainSession(Assembly.GetExecutingAssembly(), null, IntPtr.Zero))
+            using (var hold = new ManualResetEventSlim())
             {
+                twain.DeviceEvent += (sender, e) =>
+                {
+                    Console.WriteLine($"Got device event " + (TWDE)e.Event);
+                };
+                twain.ScanEvent += (sender, closing) =>
+                {
+                    Console.WriteLine($"Got scan event " + closing);
+
+                    TW_USERINTERFACE twuserinterface = default;
+                    if (twain.TWAIN.DatUserinterface(DG.CONTROL, MSG.DISABLEDS, ref twuserinterface) == STS.SUCCESS)
+                    {
+                        Console.WriteLine("Disabled device.");
+                    }
+                    else
+                    {
+                        Console.Error.WriteLine("Failed to disabled device.");
+                    }
+                    hold.Set();
+                };
+
                 if (twain.Open() == TWAINWorkingGroup.STS.SUCCESS)
                 {
                     Console.WriteLine("Opened DSM");
+
                     Console.WriteLine("Default device:");
                     Console.WriteLine($"\t{twain.DefaultDevice}");
+
                     Console.WriteLine("All devices:");
+                    TW_IDENTITY dsToUse = default;
                     foreach (var dev in twain.GetDevices())
                     {
                         Console.WriteLine($"\t{dev}");
+                        if (dev.ProductName == "TWAIN2 FreeImage Software Scanner")
+                        {
+                            dsToUse = dev;
+                        }
+                    }
+
+                    twain.CurrentDevice = dsToUse;
+                    if (twain.CurrentDevice.HasValue)
+                    {
+                        Console.WriteLine("Current device after opening attempt:");
+                        Console.WriteLine($"\t{twain.CurrentDevice}");
+
+                        var sts = twain.StartCapture(false);
+                        if (sts == STS.SUCCESS)
+                        {
+                            Console.Error.WriteLine("Waiting for capture to complete.");
+
+                            while (!hold.IsSet) Thread.Sleep(100);
+                        }
+                        else
+                        {
+                            Console.Error.WriteLine("Failed to start capture: " + sts);
+                        }
+                    }
+                    else
+                    {
+                        Console.WriteLine("No devices opened.");
                     }
-                    Console.WriteLine("Current device:");
-                    Console.WriteLine($"\t{twain.CurrentDevice}");
-                    twain.CurrentDevice = twain.DefaultDevice;
-                    Console.WriteLine("Current device after setting:");
-                    Console.WriteLine($"\t{twain.CurrentDevice}");
                 }
                 else
                 {
@@ -32,7 +82,7 @@ namespace Net5Console
                 }
                 Console.WriteLine("Test Ended");
             }
-        
+
         }
     }
 }