LClrCell
LClrCell Delete the contents of a cell
#include <Lists.h> List Manager Package
void LClrCell(theCell, theList );
Cell theCell ; the cell to erase
ListHandle theList ; handle leading to a ListRec
LClrCell removes all data from a cell, by setting its length to 0.
theCell is a Cell (a.k.a. Point); it identifies the cell you wish to clear.
theList is a handle leading to a variable-length ListRec structure. It is a
value previously obtained via LNew.
Returns: none

Notes: The cell's display area is cleared immediately, unless drawing is off (see
The cell's length is set to 0 and the actual storage area is not recovered
until the 32K list-data maximum is reached (triggering garbage
collection).