How to use Windows touch keyboard in WPF applications

From Windows 8 and forward there is a touch keyboard in Windows.
The touch keyboard is integrated into WinRT applications.
In desktop mode, the keyboard doesn't pop up when required, and there is very little support for opening and closing the keyboard.

• Why won't WPF controls work with touch manipulations?

• SystemEvents.DisplaySettingsChanging Event
• SystemEvents.UserPreferenceChanging Event

Because these are static events, you must detach your event handlers when your application is disposed, or memory leaks will result.

• UserPreferenceCategory Enumeration

Here is a video from Microsoft showing how the keyboard works in Windows.

• How to use the touch keyboard

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