[.net] Modifying KeyEventArgs

I'm not really sure what you are asking, if you don't want "Shift" to see "Ctrl" this is not possible if both keys are down, it's more of a logic problem, but anyway, what I would do...

Use multiple event handlers subscribed to the event, which check the state of the keys they care about, and only handle them if they care about them.

A bit of pseudo-esq code

... Foo.KeyDown += new KeyEventHandler(foo);Foo.KeyDown += new KeyEventHandler(bar);...private void foo(object sender, KeyEventArgs e){   if(e.Shift || e.Alt)   {      Console.WriteLine("ZOMG SHIFT or ALT!");   }}private void bar(object sender, KeyEventArgs e){   if(e.Ctrl)   {      Console.WriteLine("Ctrl is down");    }}

Bear in mind this could be inefficient and I may or may not have misunderstood your question, if you do use this method don't forget to remove the delegates on the event when you are done listening.

Just a side point, obviously i'm not sure what your aim is (it would be good if you stated it), if you are *doing* things on key down i would suggest that isnt that wise because it may fire multiple times when the key is down, i usually temp to create a stack of keys + modifers, and set and unset the state of keys on the state / modifers which is then processed by my Update(); method(s) - as it's an event it can fire anytime when the message pump decides it's time to pump.