How can I get the corresponding DIK value of a VK key value?

Question

In .NET I can get the VK value of a pressed key in the "KeyDown" event. Wath I need is the DIK value of the pressed key. How do I do this?

I tried to use the MapVirtualKey API. But it doesn't work with all keys. (works with the ones in the main keyboard).

Is there an easy way to do this?