A compile-time error will be displayed.

I use the desktop pc is normally compiled.

However, in another pc and laptop pc it will not compile.

Using the program

The Keyboard.press ().

// use this option for OSX:
char ctrlKey = KEY_LEFT_GUI;
// use this option for Windows and Linux:
// char ctrlKey = KEY_LEFT_CTRL;

void setup() {
// make pin 2 an input and turn on the
// pullup resistor so it goes high unless
// connected to ground:
pinMode(2, INPUT_PULLUP);
// initialize control over the keyboard:
Keyboard.begin();
}

void loop() {
while (digitalRead(2) == HIGH) {
// do nothing until pin 2 goes low
delay(500);
}
delay(1000);
// new document:
Keyboard.press(ctrlKey);
Keyboard.press('n');
delay(100);
Keyboard.releaseAll();
// wait for new window to open:
delay(1000);
}

What is the solution?

More details please.

What is the error ?
Which version(s) of the IDE ?
Same version on each PC ?

Hi,
Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html
then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.

Thanks.. Tom.. :slight_smile:

Have you selected the same target board on all PCs?