Returns the width of a font.
graphics-ports
get-font-width port &optional font => width
port
A graphics port.
font
A font.
width
An integer.
The function get-font-width returns the width in pixels of the font associated with port , or the font given.
get-font-width
Drawing - Graphics Ports
CAPI User Guide and Reference Manual (Unix version) - 3 Aug 2017