Deleting or overwriting ACS characters

[johnsmith99]

Hello,

I've created a simple box with waddch() and ACS_VLINE/ACS_HLINE. I would
like to remove this box with a keypress, but I cannot seem to do so. I have
attempted to write over the characters with wprintw(), deleting them with
wdelch() and overwriting with waddch(window, ' ') with no luck.

Am I missing something very simple, or can these characters not be removed
without deleting the window?

johnsmith99
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