Welcome to the MSDN Library
Abandon all hope, ye who enter here.
And for those who get a kick out of endless urls:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/WinUI/
WindowsUserInterface/UserInput/KeyboardInput/KeyboardInputReference/
KeyboardInputFunctions/ToUnicodeEx.asp

Reads like a novel, doesn't it? It gets especially interesting in the middle part, where not only »WinUI« follows »winui«, but those are followed by »WindowsUserInterface«. Must be a department of the department for redundancy department.