When you tap a Button with a finger or stylus, or press a left mouse button while the pointer is over it, the button raises the Click event. If a button has keyboard focus, pressing the Enter key or the Spacebar key also raises the Click event.
You generally can't handle low-level PointerPressed events on a Button because it has the Click behavior instead. For more info, see Events and routed events overview.
You can change how a button raises the Click event by changing the ClickMode property. The default ClickMode value is Release. If ClickMode is Hover, the Click event can't be raised with the keyboard or touch.
Button content