Dos Bank

DosBank Credit Card
Validation Program
Copyright 1994,1995 by
Joe Maguire and JFGrafix, Inc.
List of files DISTRIBUTED with DosBank:
1. LOAD.EXE
2. CCARD.EXE
3. DOSBANK.DOC
4. DOSBANK.REG
5. CCARD.001
Users of DosBank must accept this disclaimer of warranty

"DosBank" is supplied as is. The author disclaims all
warranties, expressed or implied, including, without
limitation, the warranties of merchantability and of
fitness for any purpose. The author assumes no
liability for damages, direct or consequential, which
may result from the use of DosBank."
DosBank is a "shareware program" and is provided at no

charge to the user for evaluation. Feel free to share
it with your friends, but please do not give it away
altered or as part of another system. The essence of
"user-supported" software is to provide personal
computer users with quality software without high
prices, and yet to provide incentive for programmers
to continue to develop new products. If you find this
program useful and find that you are using DosBank and
continue to use DosBank after a reasonable trial
period, you must make a registration payment of $17.95
to Joe Maguire. The $17.95 registration fee will
license one copy for use on any one computer at any one
time. You must treat this software just like a book.
An example is that this software may be used by any
number of people and may be freely moved from one
computer location to another, so long as there is no
possibility of it being used at one location while it's
being used at another. Just as a book cannot be read
by two different persons at the same time.
Commercial users of DosBank must register and pay for

their copies of DosBank within 30 days of first use
or their license is withdrawn. Site-License
arrangements may be made by contacting Joe Maguire
at the address below.
Anyone distributing DosBank for any kind of

remuneration must first contact Joe Maguire at the
address below for authorization.
You are encouraged to pass a copy of DosBank along to

your friends for evaluation. Please encourage them
to register their copy if they find that they can use
it.
What Is DosBank?
DosBank is a Credit Card validation program developed

for individuals and companies that take credit card
orders over the telephone without any immediate means
of verification.
The program has saved our company thousands of dollars,

and will do the same for yours. This version of the
program is laid out in a data entry format, but can
be adapted to any enviroment you run under. For you
programmers out there you can pass a parameter to
Dosbank and have it return a code, you can then in turn
read that code back into your own program. Details of
this feature are described below.
The program has a number of options from displaying a

message telling you if the card is good or not, as well
as telling you what type of card it is, MasterCard,
Visa, American Express or Discover.
Installation:
"CCARD.EXE" (the main program), "LOAD.EXE" (Beginning

screen) and all other "DosBank" files can be put into
the directory of your choice. If you wish to run the
program from anywhere in your system, you need to put
that directory into your path. For best results always
run "LOAD" from the same directory ALL of the other
files are in. "LOAD" is NOT required for the program
to run properly, it only shows a PCX file and is a
prelude to "CCARD".
Once you have completed the above DosBank is ready to go
To start Dosbank you can run the "LOAD.EXE" startup

screen which will lead you into Dosbank, or you can run
"CCARD.EXE" for an immediate entry into the program.
Instructions:
1. Entering a Number: There are 2 ways to enter a

number into DosBank. first you can just type it in
normally and hit the <Enter> key and it will
validate that number. Secondly, you can use your
mouse and select the numbers individually by using
the "Number Pad" provided with the program, and
select the "Green" <Enter> under option one.
2. Verification: Once you select <Enter> the program

will display the results of the verification.
It will display a CYAN sreen with a message saying:
Valid <Card Type> Number

Card Type will either be Visa, Mastercard, American
Express or Discover. If the Card number did not
pass the validation process then you will get a
message saying:
Invalid <Card Type> Number
and the screen will turn red.
3. Command Line option: You can pass a parameter to

Dosbank via the command line. Example:
"CCARD 6666666666666"
"CCARD" being the program name, and

"6666666666666" being the Credit Card number.
The Command Line option will return 1 of 5

different options, with 2 of those options the
Credit Card company will be displayed, those two
options are Passed and Failed. The following are
the result codes:
"1" - Program Error:Can mean it was

Program, User or Number produced
"2" - Followed by Credit Card Type.

This means the number passed
validation process.
"3" - Followed by Credit Card Type.

This means the number failed
validation process.
"4" - The number entered did not belong

to a Major Credit Card Company.
Could not process.
"5" - Invalid Number: Main cause of

this error is length of number
passed to program. The number
should be between 13 and 16
characters.
The first character of the return code will always

be a 1-5 so you can write your program accordingly.
If the number passes or fails you can always count
on the Credit Card company to be displayed along
with the result code.
If you were to pass the number to DosBank from

the example above, the resulting code would be
returned:
"2 Discover"
"2" Meaning passed, as described above, and

"Discover" being the Company that issued the
Credit Card.
Program Information:
This program was written in QuickBasic v4.5
This Program was written by Joe Maguire, a

Programmer/Analyst for a Support company in
Florida.
Source Code Information:
The source code is available and can be purchased

while registering this program. The Source code
costs $67.95 (Including Registration), and
enables you to adapt the program to your specific
needs. In my example earlier, I've adapted it so
I can call it and it will return a code to the
clipboard telling me whether it passed or not.
If you don't have a programmer on staff, or don't

have one that writes in QuickBasic. I can also
quote you on what I would charge to write it into
your daily procedures for you. Just notify me at
the address above and I will contact you
immediately.
This program has also been written in Visual Basic

for Windows, and can purchased for the same
amounts as stated above.
Thank you for evaluating DosBank v1.0, I'm sure

you'll find it's everything you're looking for in
a quick Credit Card Validation utility for Windows.
If you have an comments or questions about DosBank,

please leave them on via E-Mail on America
On-Line(AOL) care of "JoeFM", or send them to:
Joe Maguire
P.O. Box 180185
Casselberry, FL 32718-0185

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What is DosBank and what does it do?

What is DosBank and what does it do?

How does DosBank validate credit card numbers?

How does DosBank validate credit card numbers?

DosBank Credit Card

Joe Maguire and JFGrafix, Inc.

List of files DISTRIBUTED with DosBank:

Users of DosBank must accept this disclaimer of warranty

DosBank is a "shareware program" and is provided at no

Commercial users of DosBank must register and pay for

Anyone distributing DosBank for any kind of

You are encouraged to pass a copy of DosBank along to

DosBank is a Credit Card validation program developed

The program has saved our company thousands of dollars,

The program has a number of options from displaying a

"CCARD.EXE" (the main program), "LOAD.EXE" (Beginning

Once you have completed the above DosBank is ready to go

To start Dosbank you can run the "LOAD.EXE" startup

1. Entering a Number: There are 2 ways to enter a

2. Verification: Once you select <Enter> the program

It will display a CYAN sreen with a message saying:

Valid <Card Type> Number

Invalid <Card Type> Number

and the screen will turn red.

3. Command Line option: You can pass a parameter to

"CCARD" being the program name, and

The Command Line option will return 1 of 5

"1" - Program Error:Can mean it was

"2" - Followed by Credit Card Type.

"3" - Followed by Credit Card Type.

"4" - The number entered did not belong

"5" - Invalid Number: Main cause of

The first character of the return code will always

If you were to pass the number to DosBank from

"2" Meaning passed, as described above, and

This program was written in QuickBasic v4.5

This Program was written by Joe Maguire, a

Source Code Information:

The source code is available and can be purchased

If you don't have a programmer on staff, or don't

This program has also been written in Visual Basic

Thank you for evaluating DosBank v1.0, I'm sure

If you have an comments or questions about DosBank,

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