Usually when you want to send an email for a webpage you have
<a href="mailto:firstname.lastname@example.org?subject=Who%20knows">send email</a>
But this would normally trigger the email client on the computer, but how would you do this with Gmail?
This is for a small application and later I will need to add appointments in the Gmail Calendar. I am bringing this up in case I need to have a common setup for both?