What did you expect from day(0)?

How about a test:
msgbox day(0) & vblf & format(0,"mmmm dd, yyyy")

How about something like:

Option Explicit
Private Sub CommandButton1_Click()
Unload Me
End Sub
Private Sub TextBox1_BeforeUpdate(ByVal Cancel As MSForms.ReturnBoolean)

Dim StartDate As Date
Dim EndDate As Date

Me.Label1.Caption = ""
If IsDate(Me.TextBox1.Text) = True Then
StartDate = CDate(Me.TextBox1.Text)
EndDate = DateSerial(Year(StartDate), _
Month(StartDate) + 12, Day(StartDate))
Me.TextBox2.Text = Format(EndDate, "dd/mm/yyyy")

Else
Me.Label1.Caption = "Please Enter a date!"
Cancel = True
End If

End Sub
Private Sub UserForm_Initialize()
With Me.CommandButton1
.Cancel = True
.TakeFocusOnClick = False
.Caption = "Cancel"
End With

Me.Label1.Caption = ""
End Sub

ps. If you want to remove the possibility of using the wrong date (01/02/03 is
ambiguous), maybe using a calendar control to prompt the user would be better:

See Ron de Bruin's site for more info:
http://www.rondebruin.nl/calendar.htm


johnboy wrote:

Hi all,
I have a userform with two textboxes - one to enter a start date. The other
shows the calculated end date from textbox1 change event.
However, my code is not producing the required result (entered date + 12
months) I would be grateful if some kind person could assist and correct the
problem please.

Private Sub HolStartTextBox_Change()
Dim startdate As Date, enddate As Date
On Error Resume Next
startdate = CDate(HolStartTextBox.Text)
enddate = Year(startdate) & "/" & Month(startdate) + 12 & "/" & Day(0)
If IsDate(startdate) = True Then
HolEndTextBox.Text = Format(enddate, "dd/mm/yyyy")
End If
On Error GoTo 0
End Sub

--
Jon

--

Dave Peterson