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-
- WTIME.EXE (Version 1.0) Copyright (c) 1992 John Deurbrouck
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- First Published in PC Magazine October 27, 1992 (Utilities)
- -------------------------------------------------------------------------
-
- WTIME:
-
- WTIME uses your modem to synchronize the clock in your PC with
- that of the Automatic Computer Time Service (ACT), which is maintained
- by the National Institute of Standards and Technology. This program can
- be run under Windows 3.x or OS/2's Windows implementation. With a click
- of the mouse, a call taking less than 1 minute will ensure that your
- date/time stamp is accurate. If you wish, you can even have WTIME make
- the call automatically each time you bring up Windows.
-
- To recompile the C source code, you'll need Microsoft Quick C for Windows,
- Version 1.0; Microsoft C++, Version, 7.0; Borland C++, Version 3.0; or
- Borland's Turbo C++ for Windows, Version 1.0.
-
- USING WTIME
-
- In order to install WTIME, you will need to copy two files--WTIME.EXE
- and WTIME.HLP--into a directory where Windows can find them. You can run
- WTIME with Windows' File Run command in the Program Manager, or you can add
- WTIME to a Program Manager group by using File New. Note that if you later
- decide that you want to run the program every time you load Windows, you
- simply need to change the WTIME on the command line to WTIME automatic.
-
- When started, WTIME displays a conventional window with three
- submenus: File, Modem, and Help. The first time you use the program you
- must begin by selecting Modem Setup, which allows you to configure WTIME.
- (The Modem Call and Modem Hangup options are initially grayed out.)
- I'll discuss the configuration process below, but since it takes longer
- to describe than to do, let me start with how WTIME works once your
- modem is ready to use it.
-
- Setting the time could hardly be simpler: When you select Modem
- Call, WTIME does the rest. If you have an external modem, you can monitor
- the program's progress by watching your modem's lights. In any case,
- you'll see the succession of messages that WTIME puts up in its window
- (``sending escape sequence,'' ``looking for data,'' and so on). And if
- you keep Windows' CLOCK visible at the same time, you'll shortly see it
- jump to the correct time at the instant WTIME sets it. WTIME will then
- automatically send an escape sequence in order to terminate the call.
-
- While a call is in progress, you can cancel it at any time by
- selecting Modem Hang Up. Selecting File Exit (the only option under the
- File menu heading) or double-clicking the system menu will shut down
- the program; if a call is in progress, WTIME will not exit until the
- modem is properly reset.
-
- When using WTIME, you may notice one minor bug in Windows 3.1's CLOCK.
- If the digital clock display is active and the time shifts from an hour
- that has two digits (for example, 10:02) to one with one digit
- (such as 9:59), CLOCK does not always erase the leading digit. Thus,
- in this case, the display may end up reading 19:59. Just resize the
- window slightly to force a redraw and the superfluous digit will
- disappear.
-
- SETTING UP WTIME
-
- The Modem Setup dialog box, lets you configure WTIME for your time
- zone, daylight saving time preference, dial string, and COM port.
-
- WTIME's time zone setting, including (when applicable) an X in the
- Daylight Savings Time box, reflects the difference between your local
- time and the Greenwich mean time (GMT), which the ACTS reports.
- The menu choices--eastern, central, mountain, and Pacific--cover most
- readers' locales. Saving your choice changes the TimeOffset entry in
- the [WTime] section that WTIME creates in your WIN.INI file. The
- TimeOffset entry simply expresses the number of minutes by which your
- time zone differs from that of the GMT.
-
- If you don't live in one of the preprogrammed time zones, you can
- still use WTIME by changing the TimeOffset number in WIN.INI with a text
- editor. Newfoundland, for example, is 90 minutes in advance of eastern
- time. Since the EST TimeOffset is -300, setting TimeOffset to -210
- configures WTIME for Newfoundland. Similarly, Alaska's TimeOffset is
- -540 (60 minutes behind Pacific time's -480), and Hawaii's is -660
- (3 hours, or 180 minutes, behind Pacific time). With manual editing
- you can also intentionally set your clock a bit slow or fast. The
- central time zone's normal TimeOffset, for example, is -360.
- If you wanted to set the clock on your PC to run 5 minutes fast, all you
- would have to do is set TimeOffset to -355.
-
- Valid values for TimeOffset range from -1439 (23 hours 59 minutes
- before the GMT) to 1439 (23 hours 59 minutes after the GMT). Since
- several states and locations outside the United States do not observe
- daylight saving time, the WTIME utility provides a Use Daylight Savings
- Time check box.
-
- The Modem Dial String control allows you to change the string your
- modem uses to dial the ACTS. WTIME allows a dial string of up to 79
- characters.
-
- The default string
-
- ATDT13034944774
-
- should work for most Hayes-compatible modems when you don't need to go
- through a PBX. The AT signals the modem that a command is about to follow.
- The DT specifies Touch-tone dialing, and 13034944774 is the phone number
- of the atomic clock you want to reach (303-494-4774). You can insert the
- hyphens in the actual dial string if you wish; the modem will ignore them.
-
- You can change the dial string. For older, pulse-dialing systems,
- you'll need to change the DT to DP, for example. To dial 9 and pause
- for 2 seconds before actually dialing the phone number, change the dial
- string to
-
- ATDT9,,13034944774
-
- You might also want to add an M (for Mute) before the DT, to produce
- silent operation. Thus your dial string might look like this:
-
- ATMDT13034944774
-
- One beta-tester even charged WTIME calls to his credit card. This
- involved several long sequences of digits separated by series of commas.
- If you do this, however, don't forget that anyone looking at your
- WIN.INI will see your phone credit card number.
-
- The strings shown above will work for most modems. You may need to
- check your modem's manual for the proper dialing sequence if the default
- and modified strings don't work for you.
-
- The last item you need to configure is the COM port. You may choose
- COM1, COM2, COM3, or COM4 as the port to which your modem is attached.
- The modem itself must be capable of operating at 1,200 bits per second
- (the fastest speed the ACTS currently supports), and Windows must be
- configured correctly to handle the port. If the TERMINAL program that
- comes with Windows works on your system, WTIME should handle your modem
- without a problem.
-
- At any time, you can choose Reset Defaults, Save Configuration, or
- Cancel. Reset Defaults restores the original modem dial string, sets the
- time zone to Eastern, turns on the Daylight Savings Time option, and sets
- the COM port to COM1. Save Configuration writes your selected values to
- WIN.INI, and Cancel closes the Setup Modem dialog box without affecting
- your existing setup.
-
- You can uninstall WTIME by using NOTEPAD or SYSEDIT to delete the
- [WTime] section from WIN.INI. Then you just delete WTIME.EXE and
- WTIME.HLP. You'll also want to delete WTIME's icon in the Program
- Manager if you've set it up there. This process has been documented in
- WTIME's on-line help, and it cleanly eliminates WTIME from your system.
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- John Deurbrouck is a C and 80x86 assembly programmer who works on
- PC platforms.