From d5493506b670c5da6599b7d12ced1dcc70879d21 Mon Sep 17 00:00:00 2001
From: user202729 <25191436+user202729@users.noreply.github.com>
Date: Fri, 18 Jun 2021 09:45:11 +0700
Subject: [PATCH 1/3] Do not consider extended scan codes in Windows

---
 plover/oslayer/windows/keyboardcontrol.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/plover/oslayer/windows/keyboardcontrol.py b/plover/oslayer/windows/keyboardcontrol.py
index 14067456d..33478dbeb 100644
--- a/plover/oslayer/windows/keyboardcontrol.py
+++ b/plover/oslayer/windows/keyboardcontrol.py
@@ -102,6 +102,11 @@ class INPUT(ctypes.Structure):
 INPUT_MOUSE = 0
 INPUT_KEYBOARD = 1
 
+KF_EXTENDED = 0x0100
+LLKHF_EXTENDED = KF_EXTENDED >> 8
+LLKHF_LOWER_IL_INJECTED = 0x0002
+LLKHF_INJECTED = 0x0010
+
 
 # Process utils code code based on psutil implementation.
 
@@ -318,6 +323,9 @@ def _run(self):
         passthrough_down_keys = set()
 
         def on_key(pressed, event):
+            if event.flags & LLKHF_EXTENDED:
+                return False
+
             if event.flags & 0x10:
                 # Ignore simulated events (e.g. from KeyboardEmulation).
                 return False

From 7353fc91010f0698a727c6f8c0acba6effdaaa63 Mon Sep 17 00:00:00 2001
From: user202729 <25191436+user202729@users.noreply.github.com>
Date: Fri, 18 Jun 2021 09:45:49 +0700
Subject: [PATCH 2/3] Change 0x10 constant to LLKHF_INJECTED constant name in
 Windows oslayer keyboard handling

---
 plover/oslayer/windows/keyboardcontrol.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plover/oslayer/windows/keyboardcontrol.py b/plover/oslayer/windows/keyboardcontrol.py
index 33478dbeb..8dddf8998 100644
--- a/plover/oslayer/windows/keyboardcontrol.py
+++ b/plover/oslayer/windows/keyboardcontrol.py
@@ -326,7 +326,7 @@ def on_key(pressed, event):
             if event.flags & LLKHF_EXTENDED:
                 return False
 
-            if event.flags & 0x10:
+            if event.flags & LLKHF_INJECTED:
                 # Ignore simulated events (e.g. from KeyboardEmulation).
                 return False
             if event.vkCode in PASSTHROUGH_KEYS:

From d8fa159066b9690af17f27e7144c4a0576c395f4 Mon Sep 17 00:00:00 2001
From: user202729 <25191436+user202729@users.noreply.github.com>
Date: Fri, 18 Jun 2021 09:49:13 +0700
Subject: [PATCH 3/3] Add news fragment

---
 news.d/bugfix/1357.windows.md | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 news.d/bugfix/1357.windows.md

diff --git a/news.d/bugfix/1357.windows.md b/news.d/bugfix/1357.windows.md
new file mode 100644
index 000000000..7cc78a791
--- /dev/null
+++ b/news.d/bugfix/1357.windows.md
@@ -0,0 +1 @@
+Do not consider extended scan codes in Windows keyboard capture.