DateDiff function

[nibsy]

I am using the DateDiff function as follows;

 

 iDiff = DateDiff(DateInterval.Day, Now, dDate) 

 

where dDate is an input date.

 

Why does iDiff = 0 when BOTH todays and tomorrows dates are entered? Shouldn't iDiff = 1 when tomorrows date is entered?

 

Can anyone help?

[Derek Stone]

Dim dtNow As DateTime = DateTime.Now
Dim dtLater As DateTime = dtNow.AddDays(1)
Dim tsDiff As TimeSpan = dtLater.Subtract(dtNow)
MessageBox.Show(tsDiff.ToString(), "")