Yes, I was responding to you...yes, they will give windows right up until close. But what you won't see is a window that extends past the closing time. What starts to happen is the window will get shorter in order to still end at closing time. So 8pm-9pm isn't necessarily the last window - you may see 8:05pm-9pm, 8:10pm-9pm, etc.
You can enter the line at any time during the window. They don't shut down the attraction at closing time...they shut it down once everyone in line has been through it. But they won't let you in line at all after closing time - thus no FP windows that extend past that.