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CBL_READ_SCR_CHATTRS Details (↑ Screen Routines)
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Parameters on Entry:
screen-position The screen position at which to start reading.
The top left corner is row 0, column 0.
See ◄Notes on screen routines►.
string-length The length of the string to read.
Parameters on Exit:
character-buffer The characters read from the screen. This
data item must be at least as long as
specified by string-length; positions
in it beyond that length are unchanged.
attribute-buffer The attributes read from the screen. This
data item must be at least as long as
specified by string-length; positions
in it beyond that length are unchanged.
string-length If the end of the screen is reached, the
length read (in cells, that is, character-
attribute pairs) is returned in here.
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