While just playing with jQuery/JavaScript I ran across this problem. I could capture Alt and Ctrl keys but NOT Del and certainly not all of
I don't think this is possible.
You see, all kinds of user input, be it via keyboard or mouse or whatever IO device, is passed to your application through Windows in the form of messages. However, there are some dedicated messages that are captured and handled at the windows OS level. Ctrl+Alt+Del is one such operation. Windows would not pass on this message any further.