VS 2010 Number Of Days In Billing Period?

Jul 19, 2011

If a billing period always starts on say the 22nd of the month and ends on the 21st of the following month then all I'd have to really figure out is how many days are in the month the billing period started right? I hate working with Dates! This is what I've come up with using the idea above...Note, Dates are strings in the first column of a Listview in the format of, mm/dd/yyyy.

' get month from start of billing period (last item in LV) ' example of dates: 06/22/2011
Dim BillStartMonth = CInt(ListView1.Items(ListView1.Items.Count - 1).Text.Substring(0, 2))
' get Year from start of billing period (last item in LV)

[code].....

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Get the current number of usage days, unique usage days, etc in an evaluation license using CryptoLicensing Generator.

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[Code]...

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i have tried

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i want a function to calculate days number between 2 dates

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thats mean
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2 days in January
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Code:

Dim D1 As Date
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[code]....

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[CODE]...

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Public Class Form1

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged

[CODE]...

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[code]...

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