on.charIn(char)
This routine is called when the user types a letter, digit, or other
character. The parameter char is normally a one-byte string, but because it can
contain a UTF-8 encoded character, it may be two or more bytes long. It may
also contain the letters of a function name from one of the
short-cut keys,
such as “sin” from the trig menu.
Introduced in platform.apiLevel = '1.0'