TIME DIFFFERENCE between software install date and end date

Question

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I am working on window based app and creating trail software which will expire within 30 days. If user missed to call to activate software all of the Manu Item will disapear and so far I came up with following code failing to give me correct Duration or Span my code is as follow:

C++

COleDateTime timeStart;
COleDateTime timeEnd;
COleDateTime curDateTime;
COleDateTimeSpan Span;
COleDateTimeSpan ActivationSpan(30.0);

int diff;

timeStart = COleDateTime::GetCurrentTime();  // Date and time of the Installation.
timeEnd = timeStart + ActivationSpan;

Span = timeEnd - curDateTime;

diff = Span.GetDays();
CString strMessage;
strMessage.Format("ADDapt was not activated within 30 days of installation and is currently not functional. \n"
     "To activate please call Avtron Field Service at 000-000-0000 ext 1214.\n"
    "The 30 days trial period starts on the day you installed ADDapt.\n"
    "you have %d"" days left to renew ADDapt Software.", (int)Span.GetDays());
AfxMessageBox(strMessage);

Posted 1-Sep-11 4:15am

Vijay Pate

Updated 8-Sep-11 6:04am

v4

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4 solutions

Solution 4

I am fresh out of pond for VC++ and never work on it due to which I didnt understand following statement.:
Also I would not put literal string in your code, place them in the resource file. This will make localization in the future a lot easier.

Could you explain.

Posted 1-Sep-11 9:26am

Vijay Pate

Comments

André Kraak 1-Sep-11 16:05pm

If you have a question about or comment on the given solution use the "Have a Question or Comment?" option beneath the solution. When using this option the person who gave the solution gets an e-mail message and knows you placed a comment and can respond if he/she wants.

Please move the content of this solution to the solution you are commenting on and remove the solution. Thank you.

Vijay Pate 2-Sep-11 7:50am

What actual meaning of this statement:
Also I would not put literal string in your code, place them in the resource file. This will make localization in the future a lot easier.

Vijay Pate 2-Sep-11 10:53am

After Trial period expire I need MANU ITEM compltely inactive except Security tab has Log in info and Product activation code.

Any suggestion?

Thank you very much

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André Kraak · Accepted Answer · 2011-09-01T05:43:00

This is what I came up with:

C++

COleDateTime timeStart;
COleDateTimeSpan timePassed;
int daysLeft = 0;

timeStart = ???;		// Date and time of the Installation.
timePassed = COleDateTime::GetCurrentTime( ) - timeStart;
daysLeft = 30 - static_cast< int >( timePassed.GetTotalDays( ) );

CString strMessage;
if( daysLeft > 0 )
{
	strMessage.Format( "ADDapt was not activated within 30 days of "
		"installation and is currently not functional.\n"
		"To activate please call Avtron Field Service at 216-642-1230 "
		"ext 1214.\n"
		"The 30 days trial period starts on the day you installed "
		"ADDapt.\n"
		"You have %d days left to renew ADDapt Software.", daysLeft );
}
else
{
	// Format some message indicating the the trial period has elapsed.
	strMessage = "Trial period expired.";
}
AfxMessageBox( strMessage );

I entered the code without a code editor so it might contain typos.

You will need to complete this yourself.

C++

timeStart = ???;

This should be the date and time the application was installed or started for the
first time. When you use the current time the trial period will never decrease and end. The trick is to store it in such a manner that the user cannot easily access and change it and so circumvent you trial period.
[Edit - OP requested explenation]
You need to store the date the application was installed in a file or somewhere in the registry and retrieve when checking the trial period. This cannot be the current time as it should be a date in the past, so if the application was installed a week ago today (01-09-2011) the date you store would be 24-08-2011. In this case the timePassed would be 7 days and daysLeft would be 23 days.

Also I would not put literal string in your code, place them in the resource file. This will make localization in the future a lot easier.
[Edit - OP requested explenation]
You can place string in the string table of the resource file and load them when needed, see this article[^] for details.

Vijay Pate · Accepted Answer · 2011-09-01T08:49:00

Solution 2

you have mentioned
timeStart = ???; need to be timeStart = COLeDateTime::GetCurrentTime();

After I made package and start looking at message in last line ther days are not changing. ANy idea?

Thank you very much.

Posted 1-Sep-11 8:49am

Vijay Pate

v2

Comments

RaisKazi 1-Sep-11 14:53pm

You should add your comments just below Solution by using "Have a Question or Comment?"

André Kraak 1-Sep-11 16:05pm

If you have a question about or comment on the given solution use the "Have a Question or Comment?" option beneath the solution. When using this option the person who gave the solution gets an e-mail message and knows you placed a comment and can respond if he/she wants.

Please move the content of this solution to the solution you are commenting on and remove the solution. Thank you.

Vijay Pate · Accepted Answer · 2011-09-01T09:00:00

Solution 3

Change of the day from 30 to 29 is not taking place what is you sugestion on that. Please

When I finish installing software and change the Date to see if startup Message with change the day or not but it did not so it comes from Registry or manually

Posted 1-Sep-11 9:00am

Vijay Pate

Updated 1-Sep-11 9:22am

v2

Comments

André Kraak 1-Sep-11 16:05pm

If you have a question about or comment on the given solution use the "Have a Question or Comment?" option beneath the solution. When using this option the person who gave the solution gets an e-mail message and knows you placed a comment and can respond if he/she wants.

Please move the content of this solution to the solution you are commenting on and remove the solution. Thank you.

TIME DIFFFERENCE between software install date and end date

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