diff --git a/doc/Doxyfile b/doc/Doxyfile
index 2aea847..0fc7659 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -31,7 +31,7 @@ PROJECT_NAME           = "Arduino MIDI Library"
 # This could be handy for archiving the generated documentation or 
 # if some version control system is used.
 
-PROJECT_NUMBER         = "Version 3.2"
+PROJECT_NUMBER         = "Version 4.0"
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description 
 # for a project that appears at the top of each page and should give viewer 
diff --git a/doc/midi_DoxygenMainPage.h b/doc/midi_DoxygenMainPage.h
new file mode 100644
index 0000000..421d1f2
--- /dev/null
+++ b/doc/midi_DoxygenMainPage.h
@@ -0,0 +1,42 @@
+/*!
+ \mainpage Arduino MIDI Library
+ 
+ \tableofcontents
+ 
+ 
+ \page howtodoc How to use this documentation
+
+  You can browse the classes 
+ 
+ \page howtolib How to use the library
+ 
+ \section howtolib_section_callbacks Using callbacks
+ 
+ Callbacks can simplify the reception of input messages.
+ 
+ 
+ 
+ \page 
+ 
+ */
+
+// -----------------------------------------------------------------------------
+// Examples
+
+/*!
+ \example MIDI_Basic_IO.ino 
+ This example shows how to perform simple input and output MIDI. \n
+ \n
+ When any message arrives to the Arduino, the LED is turned on, 
+ then we send a Note On message, wait for a second, then send
+ the Note Off and turn off the LED.
+ \n
+ \n
+ <em>
+ Note that instead of sending a Note Off, we could have sent a
+ Note On with velocity 0 to shorten the message. This is called Running
+ Status.
+ </em>
+ \n
+ */
+
diff --git a/src/midi_Settings.h b/src/midi_Settings.h
index 217402a..debb00f 100644
--- a/src/midi_Settings.h
+++ b/src/midi_Settings.h
@@ -2,7 +2,7 @@
  *  @file       midi_Settings.h
  *  Project     Arduino MIDI Library
  *  @brief      MIDI Library for the Arduino - Settings
- *  @version    3.5
+ *  @version    4.0
  *  @author     Francois Best 
  *  @date       24/02/11
  *  license     GPL Forty Seven Effects - 2011