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GeneralRe: EVENTS PROBLEM Pin
alexrad1-Dec-06 13:25
alexrad1-Dec-06 13:25 
AnswerRe: EVENTS PROBLEM Pin
Dave Kreskowiak1-Dec-06 13:23
mveDave Kreskowiak1-Dec-06 13:23 
GeneralRe: EVENTS PROBLEM Pin
alexrad1-Dec-06 13:32
alexrad1-Dec-06 13:32 
QuestionWithin Application Hook? Pin
dslamb1-Dec-06 9:46
dslamb1-Dec-06 9:46 
AnswerRe: Within Application Hook? Pin
Dave Kreskowiak1-Dec-06 10:20
mveDave Kreskowiak1-Dec-06 10:20 
QuestionTrial Software Pin
andyr20051-Dec-06 7:07
andyr20051-Dec-06 7:07 
AnswerRe: Trial Software Pin
The ANZAC1-Dec-06 9:30
The ANZAC1-Dec-06 9:30 
AnswerRe: Trial Software Pin
Thomas Stockwell2-Dec-06 9:39
professionalThomas Stockwell2-Dec-06 9:39 
With one of my applications I have an encrypted file named "Activation.dat". This file contains 3 lines of code.

{ProgramEdition}
{Time activation file created - day of year)
(days left of the trial period)

When the program starts in the main procedure I read in all this data and make sure that the days left not equal to less than 0 and that the day of year is not before the current date of the computer. If the file is missing or the days left is less than 0 then I write to the days left field 'expired'. The program will then fail to execute. This is a very basic form of trial protection that I am using in the beta release of one of my pieces of software, I will be updating it but this is what I have right now. I would suggest a strong encryption procedure, I use a OneTimePad rolling encryption algorithm, but algorithms like RSA, DES, Rijndael should be sufficient.

For further protection you can also have the software end on a particular date.

Regards,
Thomas Stockwell

Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

Visit my homepage Oracle Studios[^]

Questionworking with crystal report Pin
Rmesh1-Dec-06 3:22
Rmesh1-Dec-06 3:22 
AnswerRe: working with crystal report Pin
Bassam Saoud1-Dec-06 10:31
Bassam Saoud1-Dec-06 10:31 
AnswerRe: working with crystal report Pin
alexrad1-Dec-06 13:03
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QuestionHow to write data into a file? Pin
ashwath19791-Dec-06 2:24
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AnswerRe: How to write data into a file? Pin
Dave Kreskowiak1-Dec-06 4:27
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AnswerRe: How to write data into a file? Pin
Nouvand8-Dec-06 2:40
Nouvand8-Dec-06 2:40 
QuestionCombo Box Databinding Pin
Tomic30-Nov-06 23:03
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AnswerRe: Combo Box Databinding Pin
Dave Kreskowiak1-Dec-06 4:33
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GeneralRe: Combo Box Databinding Pin
Tomic4-Dec-06 2:36
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QuestionLanguage Translator Pin
Osama12330-Nov-06 22:30
Osama12330-Nov-06 22:30 
AnswerRe: Language Translator Pin
Dave Kreskowiak1-Dec-06 4:21
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QuestionSecurity problem in (VB.NET , Sql Server) Console Applicaion running thru Network "Request for the permission of type " ? Pin
Anandan k30-Nov-06 20:57
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AnswerRe: Security problem in (VB.NET , Sql Server) Console Applicaion running thru Network "Request for the permission of type " ? Pin
Dave Kreskowiak1-Dec-06 4:18
mveDave Kreskowiak1-Dec-06 4:18 
QuestionSMS Website Pin
Ashish Porwal30-Nov-06 20:55
Ashish Porwal30-Nov-06 20:55 
AnswerRe: SMS Website Pin
Dave Kreskowiak1-Dec-06 4:20
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QuestionDataGridView Drag and Drop Multiple Rows Pin
venkatarama30-Nov-06 19:45
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AnswerRe: DataGridView Drag and Drop Multiple Rows Pin
Dave Kreskowiak1-Dec-06 5:48
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