Dates In UserForm Textboxes

[johnboy]

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

 

[Joel]

make enddate 365 days after the start date

enddate = startdate + 365

 

[johnboy]

Joel,
I need to show end date as 12 months including the last day of the 12 month
eg:
start 01/01/2007 end 31/12/2007
I had thought about your approach but also got some strange results - eg:
start 01/04/2007 end date shows 30/03/2008? (based on 364 days) not
31/03/2008 as I would expect.

 

[Joel]

Use dataserial. Specifying the day as 0 gives you the last day of the
previous month

enddate = DateSerial(Year(startdate) + 1, Month(startdate) + 1, 0)

 

[johnboy]

Joel,
that solved it!
many thanks
--
JB

Use dataserial. Specifying the day as 0 gives you the last day of the
previous month

enddate = DateSerial(Year(startdate) + 1, Month(startdate) + 1, 0)

 

[Dave Peterson]

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]

Dave,
I expected Day(0) to give me last day of the month.
Anyway - thankyou for your kind suggestion but I have now resolved problem
with joel's earlier posting.