The maxlength parameter is the maximum length of the text returned by Marquee object


The maxlength parameter is the maximum length of the text returned by the Marquee object, not counting HTML formatting tags. You will need to experiment with this a bit to get the right width. A good starting point is to use the width of the marquee frame divided by ten.
So for a 400-pixel-wide window, start with 40 and then adjust as necessary. It’s okay to specify a length slightly larger than the frame width, but if you specify a much longer length, it will slow down processing and increase memory usage.