diff --git a/PInvoke/Shell32/NotificationActivationCallback.cs b/PInvoke/Shell32/NotificationActivationCallback.cs
new file mode 100644
index 00000000..db12b228
--- /dev/null
+++ b/PInvoke/Shell32/NotificationActivationCallback.cs
@@ -0,0 +1,75 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Vanara.PInvoke
+{
+	public static partial class Shell32
+	{
+		/// <summary>
+		/// <para>
+		/// [Some information relates to pre-released product which may be substantially modified before it's commercially released.
+		/// Microsoft makes no warranties, express or implied, with respect to the information provided here.]
+		/// </para>
+		/// <para>Receives notification messages when an app is triggered through a toast from the action center.</para>
+		/// </summary>
+		// https://docs.microsoft.com/en-us/windows/win32/api/notificationactivationcallback/nn-notificationactivationcallback-inotificationactivationcallback
+		[PInvokeData("notificationactivationcallback.h", MSDNShortId = "9DB90C47-6FFA-44CA-8D33-709DD8CDDA29")]
+		[ComImport, Guid("53E31837-6600-4A81-9395-75CFFE746F94"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown))]
+		public interface INotificationActivationCallback
+		{
+			/// <summary>
+			/// <para>
+			/// [Some information relates to pre-released product which may be substantially modified before it's commercially released.
+			/// Microsoft makes no warranties, express or implied, with respect to the information provided here.]
+			/// </para>
+			/// <para>Called when a user interacts with a toast in the action center.</para>
+			/// </summary>
+			/// <param name="appUserModelId">The unique identifier representing your app to the notification platform.</param>
+			/// <param name="invokedArgs">
+			/// Arguments from the invoked button. <c>NULL</c> if the toast indicates the default activation and no launch arguments were
+			/// specified in the XML payload.
+			/// </param>
+			/// <param name="data">The data from the input elements available on the notification toast.</param>
+			/// <param name="count">The number of data elements.</param>
+			/// <returns>If this method succeeds, it returns <c>S_OK</c>. Otherwise, it returns an <c>HRESULT</c> error code.</returns>
+			/// <remarks>
+			/// <para>
+			/// In order for your app to respond to toasts in the action center, you need to override this method in your app. You also will
+			/// need to create a shortcut on the start menu. For more information about how to respond to activation notifications, see
+			/// Respond to toast activations.
+			/// </para>
+			/// <para>If your application uses non-interactive toasts, you can respond to those without using invokedArgs or data.</para>
+			/// <para>If you return a failure code, the activation will fail and the user can try again to activate your app.</para>
+			/// </remarks>
+			// https://docs.microsoft.com/en-us/windows/win32/api/notificationactivationcallback/nf-notificationactivationcallback-inotificationactivationcallback-activate
+			// HRESULT Activate( LPCWSTR appUserModelId, LPCWSTR invokedArgs, const NOTIFICATION_USER_INPUT_DATA *data, ULONG count );
+			[PreserveSig]
+			HRESULT Activate([MarshalAs(UnmanagedType.LPWStr)] string appUserModelId, [MarshalAs(UnmanagedType.LPWStr)] string invokedArgs, [In, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 3)] NOTIFICATION_USER_INPUT_DATA[] data, int count);
+		}
+
+		/// <summary>
+		/// <para>
+		/// [Some information relates to pre-released product which may be substantially modified before it's commercially released.
+		/// Microsoft makes no warranties, express or implied, with respect to the information provided here.]
+		/// </para>
+		/// <para>
+		/// Contains information about how a user interacted with a notification toast in the action center. This structure is used by Activate.
+		/// </para>
+		/// </summary>
+		/// <remarks>
+		/// Each key-value pair contains a piece of information based on an item in the notification toast when the Activate callback is triggered.
+		/// </remarks>
+		// https://docs.microsoft.com/en-us/windows/win32/api/notificationactivationcallback/ns-notificationactivationcallback-notification_user_input_data
+		// typedef struct NOTIFICATION_USER_INPUT_DATA { LPCWSTR Key; LPCWSTR Value; } NOTIFICATION_USER_INPUT_DATA;
+		[PInvokeData("notificationactivationcallback.h", MSDNShortId = "C39B906E-4EB2-4EFF-B0A3-76E6B17A3662")]
+		[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode), Serializable]
+		public struct NOTIFICATION_USER_INPUT_DATA
+		{
+			/// <summary>The ID of the user input field in the XML payload.</summary>
+			[MarshalAs(UnmanagedType.LPWStr)] public string Key;
+
+			/// <summary>The input value selected by the user for a given input field.</summary>
+			[MarshalAs(UnmanagedType.LPWStr)] public string Value;
+		}
+	}
+}
\ No newline at end of file