Reference Manual - 1.0.1
IDirectFBWindow   UngrabKey

Ungrab a specific key, i.e. switch to standard key event dispatching.   

释放特定的处理键,也就是释放特定的处理键控制事件处理

UngrabKey (
	IDirectFBWindow		*	thiz,
	DFBInputDeviceKeySymbol			symbol,
	DFBInputDeviceModifierMask			modifiers
);

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