How do I send a Ctrl+Alt+Delete when connected from the Screen Sharing app to a Windows computer? When using Apple's Screen Sharing application to connect to a Windows computer that is running VNC, how do I send a Ctrl+Alt+Delete to the Windows computer?  I've tried a number of key sequences and none of them are working.
After some searching, I found the answer.  On the mac keyboard, you have to press

Ctrl + Option (Alt) + Command + Delete

ctrl+option (alt)+command ⌘+delete ⌦