			Help File for JDATE.EXE

	This demo program is to show how easy the julian date routines
are to use.  The program is modelled after a three function key
calculator using the Function keys to enter data.

To enter the starting date press F1 and enter the data as requested.

To enter the ending date press F2 and enter the date as requested.

To calculate the number of days between dates, press ALT-F3.

To calculate the number of days after the start date, press F3.

To calculate the start date, after entering data by F2 and F3 keys,
	press ALT-F1.

To calculate the ending date, after entering data by F1 and F3 keys,
	press ALT-F2.

If you don't want to edit old values before you press F1, F2 or F3
	press F4 then the other F key.

Assumptions:
  Range of dates 1/1/1600 to 12/31/3999
  Years in the range of 0 to 99 are assumed to be 1900 to 1999.
  If totally invalid data is entered, then the current date is used.


Other notes:
	The calendar on the opening screen will not display if the system 
clock is not accurate.  The calendar is "centered" around the current month.
If the system clock is not accurate, then the opening screen calendar and the
digital clock will not be accurate.

	Date formats are based on standard USA format.  The date format
string routine will have to be modified to handle country codes.  You have the
MASM source, so hack away if you need this feature.

	The digital clock routine is not tied to the system clock once it
starts.  Therefore, heavy disk access and a lot of protected mode access
will cause it to slow down.  For the amount of time that anyone will ever
keep a digital clock displayed, this should not matter.

Demo Logic:
	After displaying the calendar, the program draws a nice display
with output and input areas clearly marked.  The routine has enough logic
to handle most screen types without choking.  Most of the routine
is an loop waiting for key presses, running a routine to handle the key press,
printing the resulting data and then waiting for a new key press.  Since none
of the boxes can be moved, the mouse is not used by the program.

Copyright 1993, Sidney J. Kelly, All Rights Reserved.
