global keys are keyboard shortcuts that can be used even when bsplayer is not the application that has the focus. (quintessential player or winamp and probably others also support this)
For instance, if you define F1 (about) to be a global key, if you press F1 while you have the focus on notepad or any program and while bsplayer is running in the background, you will see the bsplayer about box pop up instead of notepad's help. (of course I would not recommend setting this key as a global key ;) )
(sorry I don't have your problem)
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