Scaffolding for COM work

Cargo.lock

@@ -82,6 +82,7 @@ version = "0.37.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57b543186b344cc61c85b5aab0d2e3adf4e0f99bc076eff9aa5927bcc0b8a647"
 dependencies = [
+ "windows-implement",
  "windows_aarch64_msvc",
  "windows_i686_gnu",
  "windows_i686_msvc",
@@ -89,6 +90,22 @@ dependencies = [
  "windows_x86_64_msvc",
 ]
 
+[[package]]
+name = "windows-implement"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67a1062e555f7d9d66fd1130ed4f7c6ec41a47529ee0850cd0e926d95b26bb14"
+dependencies = [
+ "syn",
+ "windows-tokens",
+]
+
+[[package]]
+name = "windows-tokens"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3263d25f1170419995b78ff10c06b949e8a986c35c208dc24333c64753a87169"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.37.0"

Cargo.toml

@@ -12,6 +12,9 @@ com = {version="0.6.0", features=["production"]}
 version = "0.37.0"
 features = [
     "alloc",
+    "implement",
+    "Win32_Media_Audio",
+    "Win32_UI_Shell_PropertiesSystem",
     "Data_Xml_Dom",
     "Win32_UI",
     "Win32_UI_Accessibility",

src/main.rs

@@ -2,6 +2,7 @@ mod pid_to_exe;
 
 use windows::Win32::{
     Foundation::{HINSTANCE, HWND},
+    Media::Audio::{IMMNotificationClient, IMMNotificationClient_Impl},
     UI::{
         Accessibility::{SetWinEventHook, HWINEVENTHOOK},
         WindowsAndMessaging::{
@@ -58,6 +59,45 @@ fn win_event_hook_loop() {
         }
     }
 }
+
+#[windows::core::implement(IMMNotificationClient)]
+struct DeviceNotification;
+
+impl IMMNotificationClient_Impl for DeviceNotification {
+    fn OnDeviceStateChanged(
+        &self,
+        pwstrdeviceid: &windows::core::PCWSTR,
+        dwnewstate: u32,
+    ) -> windows::core::Result<()> {
+        Ok(())
+    }
+
+    fn OnDeviceAdded(&self, pwstrdeviceid: &windows::core::PCWSTR) -> windows::core::Result<()> {
+        Ok(())
+    }
+
+    fn OnDeviceRemoved(&self, pwstrdeviceid: &windows::core::PCWSTR) -> windows::core::Result<()> {
+        Ok(())
+    }
+
+    fn OnDefaultDeviceChanged(
+        &self,
+        flow: windows::Win32::Media::Audio::EDataFlow,
+        role: windows::Win32::Media::Audio::ERole,
+        pwstrdefaultdeviceid: &windows::core::PCWSTR,
+    ) -> windows::core::Result<()> {
+        Ok(())
+    }
+
+    fn OnPropertyValueChanged(
+        &self,
+        pwstrdeviceid: &windows::core::PCWSTR,
+        key: &windows::Win32::UI::Shell::PropertiesSystem::PROPERTYKEY,
+    ) -> windows::core::Result<()> {
+        Ok(())
+    }
+}
+
 fn main() {
     win_event_hook_loop();
 }