Launch Condition in web setup Project

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ASP.NET

Hello Guys,

I am creating web setup for web application.
where when i am install the setup that time cteate registry in HKEY_CURRENT_USER as "InstallationDate" And "ExpiryDate" where ExpiryDate Contain installationDate plus 10 days.

Example:
if Installation Date = "20/10/2014" then
ExpiryDate = "30/10/2014"


Now after some days if user uninstall the exe and try to reinstalll the exe then i want to compare ExpiryDate and TodayDate that if today date is less than expiry date then exe get install else exe aborted.


for this i used launch condition registry key search

but i am unable to get CurrentDate(Today Date)

Please Can any one suggest me?

Thanks
Chetan V.