Visual Basic 2010/ Sub Procedure

Question

I copied the exact codes from my textbook and I have the following errors.

Error   3   'txtOutput' is not declared. It may be inaccessible due to its protection level.    C:\Users\Woong-Sup\AppData\Local\Temporary Projects\WindowsApplication1\Form1.vb    13  17  WindowsApplication1

Error   4   'txtOutput' is not declared. It may be inaccessible due to its protection level.    C:\Users\Woong-Sup\AppData\Local\Temporary Projects\WindowsApplication1\Form1.vb    15  17  WindowsApplication1

Error   1   Handles clause requires a WithEvents variable defined in the containing type or one of its base types.  C:\Users\Woong-Sup\AppData\Local\Temporary Projects\WindowsApplication1\Form1.vb    2   44  WindowsApplication1

Could anyone please tell me what the problem is? And I would appreciate if I could add you on my msn and ask some more questions! thanks

Public Class Form1
    Private Sub btnDisplay_Click() Handles btnDisplay.Click
        Dim anyDate As Date
        anyDate = CDate(InputBox("Input a date. (mm/dd/yyyy)"))
        ShowCentury(anyDate)
    End Sub

    Sub ShowCentury(ByVal anyDate As Date)
        Select Case anyDate
            Case Is >= #1/1/2000#
                txtOutput.Text = "twenty-first century"
            Case Is >= #1/1/1900#
                txtOutput.Text = "twentieth century"
            Case Else
                txtOutput.Text = "prior to the twentieth century"
        End Select
    End Sub
End Class

Answer 1

txtOutput should be a textbox on your form (form1 above)

Answer 2

This is a partial class; it won't stand on its own. The "Form1" form this class is a part of (you do have a form named "Form1", right?) needs a button named "btnDisplay" and a textbox named "txtOutput".

If you have such a form, and the above controls exist on it, ensure that the "GenerateMember" property is set to True for both of them.