Arduino FAQ - My custom library won't work, It says: X was not declared in this scope

Your name:

Your e-mail address:

Your friends:

1. e-mail address:

2. e-mail address:

3. e-mail address:

4. e-mail address:

5. e-mail address:

The following text will be sent:

You'll find the FAQ at the following address:
http://arduino.land/FAQ/index.php?action=artikel&cat=5&id=14&artlang=en

Additional message for your friends:

Please enter the captcha code