Revert "Try to improve support for extended keys"

This reverts commit a702df0.

Author: danielchalmers

RadialActions/Data/ActionUtil.cs

@@ -29,116 +29,35 @@ public static class ActionUtil
 
     #endregion
 
-    private const uint KEYEVENTF_EXTENDEDKEY = 0x0001;
     private const uint KEYEVENTF_KEYUP = 0x0002;
-    private const uint INPUT_KEYBOARD = 1;
-
-    [StructLayout(LayoutKind.Sequential)]
-    private struct INPUT
-    {
-        public uint type;
-        public InputUnion U;
-    }
-
-    [StructLayout(LayoutKind.Explicit)]
-    private struct InputUnion
-    {
-        [FieldOffset(0)]
-        public KEYBDINPUT ki;
-    }
-
-    [StructLayout(LayoutKind.Sequential)]
-    private struct KEYBDINPUT
-    {
-        public ushort wVk;
-        public ushort wScan;
-        public uint dwFlags;
-        public uint time;
-        public IntPtr dwExtraInfo;
-    }
 
     [DllImport("user32.dll", SetLastError = true)]
-    private static extern uint SendInput(uint nInputs, INPUT[] pInputs, int cbSize);
+    private static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, IntPtr dwExtraInfo);
 
     /// <summary>
     /// Simulates a key press and release.
     /// </summary>
     /// <param name="vk">The virtual key code to simulate.</param>
     public static void SimulateKey(byte vk)
     {
-        SendKey(vk, isKeyUp: false);
-        SendKey(vk, isKeyUp: true);
+        keybd_event(vk, 0, 0, IntPtr.Zero);
+        keybd_event(vk, 0, KEYEVENTF_KEYUP, IntPtr.Zero);
     }
 
     /// <summary>
     /// Simulates pressing a key down.
     /// </summary>
     private static void KeyDown(byte vk)
     {
-        SendKey(vk, isKeyUp: false);
+        keybd_event(vk, 0, 0, IntPtr.Zero);
     }
 
     /// <summary>
     /// Simulates releasing a key.
     /// </summary>
     private static void KeyUp(byte vk)
     {
-        SendKey(vk, isKeyUp: true);
-    }
-
-    private static void SendKey(byte vk, bool isKeyUp)
-    {
-        var flags = isKeyUp ? KEYEVENTF_KEYUP : 0u;
-        if (IsExtendedKey(vk))
-        {
-            flags |= KEYEVENTF_EXTENDEDKEY;
-        }
-
-        var input = new INPUT
-        {
-            type = INPUT_KEYBOARD,
-            U = new InputUnion
-            {
-                ki = new KEYBDINPUT
-                {
-                    wVk = vk,
-                    wScan = 0,
-                    dwFlags = flags,
-                    time = 0,
-                    dwExtraInfo = IntPtr.Zero
-                }
-            }
-        };
-
-        _ = SendInput(1, [input], Marshal.SizeOf<INPUT>());
-    }
-
-    private static bool IsExtendedKey(byte vk)
-    {
-        return vk switch
-        {
-            VK_MEDIA_NEXT_TRACK or VK_MEDIA_PREV_TRACK or VK_MEDIA_STOP or VK_MEDIA_PLAY_PAUSE => true,
-            VK_VOLUME_MUTE or VK_VOLUME_DOWN or VK_VOLUME_UP => true,
-            VK_LWIN => true,
-            0x5C => true, // VK_RWIN
-            0x5D => true, // VK_APPS
-            0x21 => true, // VK_PRIOR (Page Up)
-            0x22 => true, // VK_NEXT (Page Down)
-            0x23 => true, // VK_END
-            0x24 => true, // VK_HOME
-            0x25 => true, // VK_LEFT
-            0x26 => true, // VK_UP
-            0x27 => true, // VK_RIGHT
-            0x28 => true, // VK_DOWN
-            0x2C => true, // VK_SNAPSHOT (PrintScreen)
-            0x2D => true, // VK_INSERT
-            0x2E => true, // VK_DELETE
-            0x6F => true, // VK_DIVIDE (Numpad /)
-            0x90 => true, // VK_NUMLOCK
-            0xA3 => true, // VK_RCONTROL
-            0xA5 => true, // VK_RMENU
-            _ => false
-        };
+        keybd_event(vk, 0, KEYEVENTF_KEYUP, IntPtr.Zero);
     }
 
     /// <summary>