I need help with rounding an answer to either a whole number or a .5 I know
this can be done in Excel and there are limitations with the Round() function
in VBA. I've seen replies stating to use the application.round but how would
I incorporate that into mine? Here is my code:

Private Sub Worksheet_Change(ByVal Target As Range)
' This prorates the # of months'
On Error GoTo ws_exit:
Dim ans As String, DteDiff As Integer
If Not Application.Intersect(Target, Range("$C$25:$C$54")) Is Nothing Then
If UCase(Target.Value) = "Y" Then ' allows for Y and y
With Worksheets("agreement")
ans = InputBox("What is the warranty expiration date #", "Prorate
months", _
Sheets("Agreement").Range("$A$1").Value)
DteDiff = (Range("$L$11") - DateValue(ans)) / 30.42
Target = DteDiff
End With
End If