Compute the text dimensions of each character of M-text.
function computes the drawn metric of each character between
assuming that they are drawn on a window of frame
function with the drawing control object
specifies the size of
Each successive element of
are set to the drawn ink and logical metrics of successive characters respectively, relative to the drawing origin of the M-text. The number of elements of
that have been set is returned to
is too small to return all metrics, the function returns -1 and store the requested size in
Otherwise, it returns zero.
this function also computes the metrics of the overall text and stores the results in the members of the structure pointed to by
is nonzero, this function computes only the metrics of characters in the first line.