POC for handling extended keys with WaitWithTimeout of 0

C#/AutoHotInterception/ScanCodeChecker.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using AutoHotInterception.Helpers;
 
 namespace AutoHotInterception
@@ -29,10 +30,27 @@ namespace AutoHotInterception
             ManagedWrapper.SetFilter(_deviceContext, IsMonitoredDevice, ManagedWrapper.Filter.All);
             int i;
             var stroke = new ManagedWrapper.Stroke();
-            while (ManagedWrapper.Receive(_deviceContext, i = ManagedWrapper.Wait(_deviceContext), ref stroke, 1) > 0)
+            while (true)
             {
-                if (!_block) ManagedWrapper.Send(_deviceContext, _deviceId, ref stroke, 1);
-                _callback(new KeyEvent { Code = stroke.key.code, State = stroke.key.state });
+                var strokes = new List<ManagedWrapper.Stroke>();
+                while (ManagedWrapper.Receive(_deviceContext, i = ManagedWrapper.WaitWithTimeout(_deviceContext, 0), ref stroke, 1) > 0)
+                {
+                    strokes.Add(stroke);
+                }
+                if (!block)
+                {
+                    foreach (var s in strokes)
+                    {
+                        ManagedWrapper.Send(_deviceContext, _deviceId, ref stroke, 1);
+                    }
+                }
+                if (strokes.Count == 0) continue;
+                var keyEvents = new List<KeyEvent>();
+                foreach (var s in strokes)
+                {
+                    keyEvents.Add(new KeyEvent { Code = stroke.key.code, State = stroke.key.state });
+                }
+                _callback(keyEvents);
             }
         }
 
@@ -43,7 +61,8 @@ namespace AutoHotInterception
 
         private int IsMonitoredDevice(int device)
         {
-            return Convert.ToInt32(_deviceId == device);
+            return (Convert.ToInt32(_deviceId == device) );
+            //return (Convert.ToInt32(_deviceId == device || device == 12) );
         }
     }
 

C#/TestApp/ScanCodeTester.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
 using AutoHotInterception;
 
@@ -11,12 +12,17 @@ namespace TestApp
             var scc = new ScanCodeChecker();
             var devId = device.GetDeviceId();
             if (devId == 0) return;
-            scc.Subscribe(devId, new Action<KeyEvent>(OnKeyEvent), block);
+            scc.Subscribe(devId, new Action<List<KeyEvent>>(OnKeyEvent), block);
         }
 
-        public void OnKeyEvent(KeyEvent keyEvent)
+        public void OnKeyEvent(List<KeyEvent> keyEvents)
         {
-            Debug.WriteLine($"Code: {keyEvent.Code} (0x{keyEvent.Code.ToString("X")}) - {keyEvent.Code + 256}, State: {keyEvent.State}");
+            var str = $"{keyEvents.Count} - ";
+            foreach (var keyEvent in keyEvents)
+            {
+                str += $"Code: {keyEvent.Code} (0x{keyEvent.Code.ToString("X")}) - {keyEvent.Code + 256}, State: {keyEvent.State} | ";
+            }
+            Debug.WriteLine(str);
         }
     }
 }

C#/TestApp/TestDevices.cs

@@ -12,6 +12,7 @@ namespace TestApp
         public static TestDevice WyseKeyboard { get; } = new TestDevice { IsMouse = false, Vid = 0x04F2, Pid = 0x0112 };
         public static TestDevice LogitechWheelMouse { get; } = new TestDevice { IsMouse = true, Vid = 0x046D, Pid = 0xC00C };
         public static TestDevice ParbloIslandA609 { get; } = new TestDevice { IsMouse = true, Handle = "HID\\VID_0B57&PID_9091&REV_0101&Col01" };
+        public static TestDevice LogitechG604Mouse { get; } = new TestDevice { IsMouse = true, Vid = 0x046D, Pid = 0xC539 };
     }
 
     public class TestDevice