Keyboard Shift-Ctrl-ESC Key Codes

Hardware Arduino Due
#1

Hi

I'm Making a Keyboard from Arduino But I couldn't write the codes of Shift-Ctrl-ESC keys.

Can you help me?

#include "Keyboard.h"

//Define pines.
const int LEFT_SHIFT_KEY = 3; // Press SHIFT

void setup() {
// put your setup code here, to run once:

pinMode(3, INPUT_PULLUP); // Activa resistencia pullup en entrada.
Keyboard.begin(); // Iniciamos emulacion teclado.
delay (500);
}

void loop() {
// put your main code here, to run repeatedly:

int estadoPulsador = digitalRead(3);

if (digitalRead(3) == 1) // if the SHIFT Button is pressed
{
Keyboard.press('Shift');
delay(100);
Keyboard.releaseAll();
// wait for new window to open:
delay(100);
}
}

#2

I think if you study this reference page, and the example code on that page, it will be clear how to do it:
https://www.arduino.cc/reference/en/language/functions/usb/keyboard/keyboardpress/
If you’re still stuck after that, come back with your updated code and a detailed description of what you’re having trouble with.

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#3