diff --git a/extensions/vscode-api-tests/package.json b/extensions/vscode-api-tests/package.json
index f62982eca50..5f7681bf9d6 100644
--- a/extensions/vscode-api-tests/package.json
+++ b/extensions/vscode-api-tests/package.json
@@ -30,6 +30,7 @@
     "interactive",
     "languageStatusText",
     "mappedEditsProvider",
+    "nativeWindowHandle",
     "notebookCellExecutionState",
     "notebookDeprecated",
     "notebookLiveShare",
diff --git a/src/vs/platform/extensions/common/extensionsApiProposals.ts b/src/vs/platform/extensions/common/extensionsApiProposals.ts
index ef880b81e6d..98e678996e5 100644
--- a/src/vs/platform/extensions/common/extensionsApiProposals.ts
+++ b/src/vs/platform/extensions/common/extensionsApiProposals.ts
@@ -245,6 +245,9 @@ const _allApiProposals = {
 	multiDocumentHighlightProvider: {
 		proposal: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.multiDocumentHighlightProvider.d.ts',
 	},
+	nativeWindowHandle: {
+		proposal: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.nativeWindowHandle.d.ts',
+	},
 	newSymbolNamesProvider: {
 		proposal: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.newSymbolNamesProvider.d.ts',
 	},
diff --git a/src/vs/platform/window/common/window.ts b/src/vs/platform/window/common/window.ts
index a3c02dba449..cd0240d8bdc 100644
--- a/src/vs/platform/window/common/window.ts
+++ b/src/vs/platform/window/common/window.ts
@@ -354,6 +354,7 @@ export interface IOSConfiguration {
 
 export interface INativeWindowConfiguration extends IWindowConfiguration, NativeParsedArgs, ISandboxConfiguration {
 	mainPid: number;
+	handle?: string;
 
 	machineId: string;
 	sqmId: string;
diff --git a/src/vs/platform/windows/electron-main/windowImpl.ts b/src/vs/platform/windows/electron-main/windowImpl.ts
index f0540656eed..6a3ecb6a7e1 100644
--- a/src/vs/platform/windows/electron-main/windowImpl.ts
+++ b/src/vs/platform/windows/electron-main/windowImpl.ts
@@ -1092,6 +1092,11 @@ export class CodeWindow extends BaseWindow implements ICodeWindow {
 		}
 
 		// Update window related properties
+		try {
+			configuration.handle = this._win.getNativeWindowHandle().toString('base64');
+		} catch (error) {
+			this.logService.error(`Error getting native window handle: ${error}`);
+		}
 		configuration.fullscreen = this.isFullScreen;
 		configuration.maximized = this._win.isMaximized();
 		configuration.partsSplash = this.themeMainService.getWindowSplash();
diff --git a/src/vs/workbench/api/common/extHost.api.impl.ts b/src/vs/workbench/api/common/extHost.api.impl.ts
index d45dd274008..9c2c8edabd0 100644
--- a/src/vs/workbench/api/common/extHost.api.impl.ts
+++ b/src/vs/workbench/api/common/extHost.api.impl.ts
@@ -437,6 +437,10 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 				checkProposedApiEnabled(extension, 'resolvers');
 				return initData.commit;
 			},
+			get handle(): string | undefined {
+				checkProposedApiEnabled(extension, 'nativeWindowHandle');
+				return initData.handle;
+			}
 		};
 		if (!initData.environment.extensionTestsLocationURI) {
 			// allow to patch env-function when running tests
diff --git a/src/vs/workbench/services/environment/electron-sandbox/environmentService.ts b/src/vs/workbench/services/environment/electron-sandbox/environmentService.ts
index 749c5e0a167..aebabc00203 100644
--- a/src/vs/workbench/services/environment/electron-sandbox/environmentService.ts
+++ b/src/vs/workbench/services/environment/electron-sandbox/environmentService.ts
@@ -26,6 +26,7 @@ export interface INativeWorkbenchEnvironmentService extends IBrowserWorkbenchEnv
 	// --- Window
 	readonly window: {
 		id: number;
+		handle?: string;
 		colorScheme: IColorScheme;
 		maximized?: boolean;
 		accessibilitySupport?: boolean;
@@ -83,6 +84,7 @@ export class NativeWorkbenchEnvironmentService extends AbstractNativeEnvironment
 	get window() {
 		return {
 			id: this.configuration.windowId,
+			handle: this.configuration.handle,
 			colorScheme: this.configuration.colorScheme,
 			maximized: this.configuration.maximized,
 			accessibilitySupport: this.configuration.accessibilitySupport,
diff --git a/src/vs/workbench/services/extensions/common/extensionHostProtocol.ts b/src/vs/workbench/services/extensions/common/extensionHostProtocol.ts
index da967f8262f..98e78cff2f0 100644
--- a/src/vs/workbench/services/extensions/common/extensionHostProtocol.ts
+++ b/src/vs/workbench/services/extensions/common/extensionHostProtocol.ts
@@ -53,6 +53,7 @@ export interface IExtensionHostInitData {
 	consoleForward: { includeStack: boolean; logNative: boolean };
 	uiKind: UIKind;
 	messagePorts?: ReadonlyMap<string, MessagePortLike>;
+	handle?: string;
 }
 
 export interface IEnvironment {
diff --git a/src/vs/workbench/services/extensions/electron-sandbox/localProcessExtensionHost.ts b/src/vs/workbench/services/extensions/electron-sandbox/localProcessExtensionHost.ts
index e62e021ae8d..c815dbddf6b 100644
--- a/src/vs/workbench/services/extensions/electron-sandbox/localProcessExtensionHost.ts
+++ b/src/vs/workbench/services/extensions/electron-sandbox/localProcessExtensionHost.ts
@@ -511,7 +511,8 @@ export class NativeLocalProcessExtensionHost implements IExtensionHost {
 			loggers: [...this._loggerService.getRegisteredLoggers()],
 			logsLocation: this._environmentService.extHostLogsPath,
 			autoStart: (this.startup === ExtensionHostStartup.EagerAutoStart),
-			uiKind: UIKind.Desktop
+			uiKind: UIKind.Desktop,
+			handle: this._environmentService.window.handle
 		};
 	}
 
diff --git a/src/vscode-dts/vscode.proposed.nativeWindowHandle.d.ts b/src/vscode-dts/vscode.proposed.nativeWindowHandle.d.ts
new file mode 100644
index 00000000000..b5699ade4da
--- /dev/null
+++ b/src/vscode-dts/vscode.proposed.nativeWindowHandle.d.ts
@@ -0,0 +1,17 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+// https://github.com/microsoft/vscode/issues/229431
+
+declare module 'vscode' {
+
+	export namespace env {
+		/**
+		 * Retrieves a base64 representation of a native window
+		 * handle of the current window.
+		 */
+		export const handle: string | undefined;
+	}
+}