If positive, inserts additional space between letters. If negative,
removes space between letters. The amount of space inserted or
removed depends on the font but is usually measured in pixels. That
is, the following call adds about 5 pixels between each letter.
Modify the spacing between letters in text.
If positive, inserts additional space between letters. If negative, removes space between letters. The amount of space inserted or removed depends on the font but is usually measured in pixels. That is, the following call adds about 5 pixels between each letter.