diff -r 45020dd8cbd9 -r fbce915a7024 libpurple/request.h
--- a/libpurple/request.h	Sat Apr 28 18:30:14 2018 -0500
+++ b/libpurple/request.h	Mon Apr 23 16:37:00 2018 +0100
@@ -47,7 +47,8 @@
 	PURPLE_REQUEST_ACTION,     /**< Action request.            */
 	PURPLE_REQUEST_FIELDS,     /**< Multiple fields request.   */
 	PURPLE_REQUEST_FILE,       /**< File open or save request. */
-	PURPLE_REQUEST_FOLDER      /**< Folder selection request.  */
+	PURPLE_REQUEST_FOLDER,     /**< Folder selection request.  */
+	PURPLE_REQUEST_SCREENSHARE /**< Screenshare media request. */
 
 } PurpleRequestType;
 
@@ -246,9 +247,12 @@
 	                        void *user_data,
 	                        size_t action_count, va_list actions);
 
+	void *(*request_screenshare_media)(const char *title, const char *primary,
+				const char *secondary, PurpleAccount *account,
+				GCallback cb, void *user_data);
+
 	void (*_purple_reserved1)(void);
 	void (*_purple_reserved2)(void);
-	void (*_purple_reserved3)(void);
 } PurpleRequestUiOps;
 
 typedef void (*PurpleRequestInputCb)(void *, const char *);
@@ -261,6 +265,7 @@
 typedef void (*PurpleRequestChoiceCb)(void *, int);
 typedef void (*PurpleRequestFieldsCb)(void *, PurpleRequestFields *fields);
 typedef void (*PurpleRequestFileCb)(void *, const char *filename);
+typedef void (*PurpleRequestScreenshareCb)(void *, GObject *info);
 
 #ifdef __cplusplus
 extern "C" {
@@ -1576,6 +1581,30 @@
 	PurpleAccount *account, const char *who, PurpleConversation *conv,
 	void *user_data);
 
+
+/**
+ * Displays a dialog allowing the user to select a window/monitor etc. for
+ * screen sharing. Returns a #PurpleMediaElementInfo to the callback or @c
+ * NULL if the request is cancelled.
+ *
+ * @param handle      The plugin or connection handle.  For some things this
+ *                    is <em>extremely</em> important.  See the comments on
+ *                    purple_request_input().
+ * @param title       The title of the message, or @c NULL if it should have
+ *                    no title.
+ * @param primary     The main point of the message, or @c NULL if you're
+ *                    feeling enigmatic.
+ * @param secondary   Secondary information, or @c NULL if there is none.
+ * @param cb          The callback for the @c OK button.
+ * @param user_data   The data to pass to the callback.
+ *
+ * @return A UI-specific handle.
+ */
+void *purple_request_screenshare_media(void *handle, const char *title,
+				       const char *primary, const char *secondary,
+				       PurpleAccount *account, GCallback cb,
+				       void *user_data);
+
 /*@}*/
 
 /**************************************************************************/