diff --git a/source_recorder/source-recorder.el b/source_recorder/source-recorder.el
index 0de12ba..026cf7e 100644
--- a/source_recorder/source-recorder.el
+++ b/source_recorder/source-recorder.el
@@ -1,6 +1,6 @@
 (defun buffer-changes-recorder (change-beg change-end prev-len)
-  (append-to-file
-  ;(message
+  ;(append-to-file
+  (message
    (format "%s;%s;%s\n"
 	   (buffer-file-name)
 	   (format-time-string "%s")
@@ -13,8 +13,22 @@
 		     (buffer-substring change-beg change-end))
 	     )
 	   )
-   nil "~/test.log"
+;   nil "~/test.log"
    )
   )
 
 (add-hook 'after-change-functions 'buffer-changes-recorder)
+
+(defun buffer-switchs-recorder ()
+  ;(append-to-file
+  (message
+   (format "%s;%s;%s\n"
+	   (buffer-file-name)
+	   (format-time-string "%s")
+	   (format "S;%s;%s" (selected-window) (buffer-name))
+	   )
+;   nil "~/test.log"
+   )
+  )
+
+(add-hook 'buffer-list-update-hook 'buffer-switchs-recorder)