In file included from C:\Users\Bert\Documents\Arduino\libraries\IRremote\src/private/IRremoteInt.h:27:0,

                 from C:\Users\Bert\Documents\Arduino\libraries\IRremote\src/IRremote.h:28,

                 from C:\Users\Bert\Documents\Arduino\IR_NEC\IR_NEC.ino:3:

C:\Users\Bert\Documents\Arduino\libraries\IRremote\src/private/IRremoteBoardDefs.h:463:22: error: expected unqualified-id before numeric constant

 #define IR_SEND_PIN  3              // Arduino Duemilanove, Diecimila, LilyPad, etc

                      ^

C:\Users\Bert\Documents\Arduino\IR_NEC\IR_NEC.ino:5:15: note: in expansion of macro 'IR_SEND_PIN'

 const uint8_t IR_SEND_PIN = 3;      // IR LED (via transistor) -> D3

               ^~~~~~~~~~~

C:\Users\Bert\Documents\Arduino\IR_NEC\IR_NEC.ino: In function 'void setup()':

IR_NEC:32: error: 'class IRsend' has no member named 'begin'

   irsend.begin();   //hier gaat het fout------------------------------

          ^~~~~