NSWindow: Passing mouse events through window to whatever is underneath

Is it possible to 开发者_运维百科pass mouse events through an NSWindow to whatever is behind it (even if it is a window from another application)?

I am using NSWindow to create a desktop overlay, but would like to still be able to interact with other windows, even if they are behind my overlay window.

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IIRC, you can just use [window setIgnoresMouseEvents:YES].