Reference Manual - 1.0.1
IDirectFBWindow   SetColorKeyIndex

Set the window color key (indexed).    设置窗口的色彩值(索引) .

SetColorKeyIndex (
	IDirectFBWindow		*	thiz,
	unsigned int			index
);

If a pixel (indexed format) of the window matches this color index the underlying window or the background is visible at this point.

如果那window的象数与这个windows 的相同,或者那背景是可见的指针.

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