DrawJust
short textLength ; value for text length
short slop ; value indicating extra pixels
DrawJust draws the specified text string in the current pen location and
uses the current font, style and size.
textPtr is a text string indicated by a pointer.
textLength is the length of the specified string.
slop is the number of pixels to add to a string's width when it is drawn
(to help justify the text).
Returns: none