<form method= "get" action = "http://www.w3.org/">
The URL requested would have been:
http://www.w3.org/?MyMessage=This+is+a+very+long+message
If the form has several input values, the individual inputs will be separated with &. For example:
http://www.w3.org/?MyMessage= This+is+a+very+long+message&MySecondMessage=From+me