diff --git a/crates/libs/bindgen/src/rust/extensions/mod.rs b/crates/libs/bindgen/src/rust/extensions/mod.rs
index 997aba0481..f5bdc92d87 100644
--- a/crates/libs/bindgen/src/rust/extensions/mod.rs
+++ b/crates/libs/bindgen/src/rust/extensions/mod.rs
@@ -2,10 +2,8 @@ use super::*;
 
 /// Helper function for `gen_mod` and `gen_impl`.
 ///
-/// This function generates an `include!(...)` that points into the
-/// `src/includes` directory for the `windows` and `windows-sys`
-/// crates. This is no longer needed, but is preserved in case it is
-/// needed again in the future.
+/// This function generates an `include!(...)` that points into the `src/includes` directory for
+/// the `windows` and `windows-sys` crates. This makes it easy to inject code into WinMD namespaces.
 #[allow(dead_code)]
 fn include_ext(relative_path: &str) -> TokenStream {
     quote! {
@@ -20,19 +18,17 @@ fn include_ext(relative_path: &str) -> TokenStream {
 }
 
 /// Generates extension code for a specific namespace
-///
-/// This function allows us to inject code into modules generated by bindgen.
-/// This feature is no longer needed but is preserved in case it is needed
-/// again in the future.
-pub fn gen_mod(_writer: &Writer, _namespace: &str) -> TokenStream {
-    TokenStream::new()
+pub fn gen_mod(_writer: &Writer, namespace: &str) -> TokenStream {
+    match namespace {
+        "Windows.Win32.UI.WindowsAndMessaging" => {
+            include_ext("Win32/UI/WindowsAndMessaging/WindowLong.rs")
+        }
+
+        _ => quote!(),
+    }
 }
 
-/// Generates implementation extension code for a specific namespace
-///
-/// This function allows us to inject code into modules generated by bindgen.
-/// This feature is no longer needed but is preserved in case it is needed
-/// again in the future.
+/// Generates extension code that is subject to the `implement` feature for a specific namespace
 pub fn gen_impl(_namespace: &str) -> TokenStream {
     TokenStream::new()
 }
diff --git a/crates/libs/sys/src/Windows/Win32/UI/WindowsAndMessaging/mod.rs b/crates/libs/sys/src/Windows/Win32/UI/WindowsAndMessaging/mod.rs
index 2e7b089f75..8271e63984 100644
--- a/crates/libs/sys/src/Windows/Win32/UI/WindowsAndMessaging/mod.rs
+++ b/crates/libs/sys/src/Windows/Win32/UI/WindowsAndMessaging/mod.rs
@@ -3752,3 +3752,4 @@ pub type SENDASYNCPROC = Option<unsafe extern "system" fn(param0: super::super::
 pub type TIMERPROC = Option<unsafe extern "system" fn(param0: super::super::Foundation::HWND, param1: u32, param2: usize, param3: u32)>;
 pub type WNDENUMPROC = Option<unsafe extern "system" fn(param0: super::super::Foundation::HWND, param1: super::super::Foundation::LPARAM) -> super::super::Foundation::BOOL>;
 pub type WNDPROC = Option<unsafe extern "system" fn(param0: super::super::Foundation::HWND, param1: u32, param2: super::super::Foundation::WPARAM, param3: super::super::Foundation::LPARAM) -> super::super::Foundation::LRESULT>;
+core::include!(core::concat!(core::env!("CARGO_MANIFEST_DIR"), "/src/includes/", "Win32/UI/WindowsAndMessaging/WindowLong.rs"));
diff --git a/crates/libs/windows/src/Windows/Win32/UI/WindowsAndMessaging/mod.rs b/crates/libs/windows/src/Windows/Win32/UI/WindowsAndMessaging/mod.rs
index c8900118b1..f56e256e79 100644
--- a/crates/libs/windows/src/Windows/Win32/UI/WindowsAndMessaging/mod.rs
+++ b/crates/libs/windows/src/Windows/Win32/UI/WindowsAndMessaging/mod.rs
@@ -9426,3 +9426,4 @@ pub type SENDASYNCPROC = Option<unsafe extern "system" fn(param0: super::super::
 pub type TIMERPROC = Option<unsafe extern "system" fn(param0: super::super::Foundation::HWND, param1: u32, param2: usize, param3: u32)>;
 pub type WNDENUMPROC = Option<unsafe extern "system" fn(param0: super::super::Foundation::HWND, param1: super::super::Foundation::LPARAM) -> super::super::Foundation::BOOL>;
 pub type WNDPROC = Option<unsafe extern "system" fn(param0: super::super::Foundation::HWND, param1: u32, param2: super::super::Foundation::WPARAM, param3: super::super::Foundation::LPARAM) -> super::super::Foundation::LRESULT>;
+core::include!(core::concat!(core::env!("CARGO_MANIFEST_DIR"), "/src/includes/", "Win32/UI/WindowsAndMessaging/WindowLong.rs"));
diff --git a/crates/libs/windows/src/extensions/Win32/UI/WindowsAndMessaging/WindowLong.rs b/crates/libs/windows/src/includes/Win32/UI/WindowsAndMessaging/WindowLong.rs
similarity index 100%
rename from crates/libs/windows/src/extensions/Win32/UI/WindowsAndMessaging/WindowLong.rs
rename to crates/libs/windows/src/includes/Win32/UI/WindowsAndMessaging/WindowLong.rs