See: Fn 3700H (query switch character)
Fn 3701H (set switch character)
These two functions are Undocumented and Obsolete .
They were intended as part of a system that would enable DOS users to
select a character other than slash (/) as the lead character for command
options. See the obsolete SWITCHAR= CONFIG.SYS command.
See Also: Handle-Oriented File I/O
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