From 3d26b490c53a41596cb2bcf86d6d752c7b3cb97d Mon Sep 17 00:00:00 2001
From: Alex Jerabek <aljerabe@microsoft.com>
Date: Wed, 6 Jun 2018 16:57:10 -0700
Subject: [PATCH] Event class documentation

---
 types/office-js/index.d.ts | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/types/office-js/index.d.ts b/types/office-js/index.d.ts
index 5af6916816..4d06e7b764 100644
--- a/types/office-js/index.d.ts
+++ b/types/office-js/index.d.ts
@@ -523,7 +523,7 @@ declare namespace Office {
          */
         name: string;
     }
-    export namespace AddinCommands {
+    namespace AddinCommands {
         /**
          * The event object is passed as a parameter to add-in functions invoked by UI-less command buttons. The object allows the add-in to identify which button was clicked and to signal the host that it has completed its processing.
          * 
@@ -539,8 +539,13 @@ declare namespace Office {
          *
          * Applicable Outlook mode: Compose or Read
          */
-        export interface Event {
+        interface Event {
             
+            /**
+             * Information about the control that triggered calling this function
+             */
+            source:Source;
+
             /**
              * Indicates that the add-in has completed processing that was triggered by an add-in command button or event handler.
              * 
@@ -561,6 +566,17 @@ declare namespace Office {
              */
             completed(options?: any): void;
         }
+
+        /**
+         * Encapsulates source data for add-in events.
+         */
+        interface Source {
+
+            /**
+             * The id of the control that triggered calling this function. The id comes from the manifest and is the unique ID of your Office Add-in as a GUID.
+             */
+            id: string;
+        }
     }
     /**
      * Provides objects and methods that you can use to create and manipulate UI components, such as dialog boxes, in your Office Add-ins.