This event is raised when the user enters text on the keyboard. In contrast to WinForms, ReaderControls will not generate both KeyPress and KeyDown events. Instead it will just generate a KeyDown event when the user presses a key, and a KeyUp event when the user releases the key. If the user holds a key, a number of KeyDown events will be generated.

The ReaderControls KeyDown event specifies both the key's unicode character and its low level key data and modifiers. In addition, it specifies a culture-specific string representation.