Specifies the buttons for which button release events will be processed in the context.
In the case of overlapping contexts, button release events for buttons that are not selected in this field may be processed by underlying contexts.
If both press and release events are selected for a button (see the lcBtnDnMask field above),
then the interface will cause the context to implicitly capture all tablet events while the button is down. In this case, events occurring outside the context will be clipped to the context and processed as if they had occurred in the context. When the button is released,
the context will receive the button release event, and then event processing will return to normal.
Specifies the buttons for which button release events will be processed in the context. In the case of overlapping contexts, button release events for buttons that are not selected in this field may be processed by underlying contexts. If both press and release events are selected for a button (see the lcBtnDnMask field above), then the interface will cause the context to implicitly capture all tablet events while the button is down. In this case, events occurring outside the context will be clipped to the context and processed as if they had occurred in the context. When the button is released, the context will receive the button release event, and then event processing will return to normal.