TSTOH(<C time string>)
 Converts a time string to hours.
 Returns <expN> number of hours that equal <time string>.

 <time string> is in the format "HH:MM:SS",
 the same as returned by the TIME() function.

 Useful in applications that handle time by hours.

 * How many hours have elapsed since midnight?
 hrs_today = TSTOH( TIME() )

 * How many hours did an operation take?
 start_time = TIME()
 <operation to be timed>
 end_time = TIME()

 * Elapsed time in hours
 hrs_time = TSTOH(end_time) - TSTOH(start_time)


             Placed in the Public Domain by Tom Rettig Assoc.