Lots of IFs based on User-inputted date

Hello everyone,

This is a tricky one, any advice is appreciated here.

I need the user to input a date into my Excel Macro through a popup (InputBox)

Using that input (We'll call it MailerDate) we need to:

For each row...

Compare the input (MailerDate) to the date in column T ('Contract End') [Format: DD/MM/YY)]


If the date is anything up to 1 Month minus 1 day *after* MailerDate, the V column (of that row) needs to be changed to 0.

If the date in column T is 1 month after MailerDate TO 2 months minus 1 day after MailerDate, value of the V needs to be changed to 1.

If the date in column T is 2 months after MailerDate TO 3 months minus 1 day after MailerDate, value of the V needs to be changed to 2.

and so on until..

If the date in column T is 18 months after the MailerDate to 19 months minus 1 day after the MailerDate, value of the V needs to be changed to 18.


It's a complicated one - but it's basically a IF statement (or CASE? Not that familiar with the VBScripting) and a InputBox used to input a date.. With a loop to run this to the last row of the excel file.

Suggestions?

So far all I have is..

MailerDate = InputBox("Enter the mailing date - Format MM/DD", "Enter Mailing Date", "MM/DD")

Dim r As Range, i As Long

For Each r In Range("V2", Range("V2").End(xlDown))
If
{still researching how to do this exactly..}
End If
Next r

Thanks so much!

Daniel