How to opperate the @ key on a dell azerty french keyboard

Here is a chart. But you can always used the windows character map.

French Keyboard (http://msdn.microsoft.com/en-us/library/ms892155.aspx)

"alt" + "shift" + "0"

Or Belgian:

"alt" + "shift" + "2"

Could be "Ctrl" + "Shift" + "Symbol Key"