Object-Oriented Programming with Visual Basic .NET
by J. P. Hamilton 

This errata page lists errors outstanding in the most recent printing.

If you have technical questions or error reports, you can send them to
booktech@oreilly.com.  Please specify the printing date of your copy.

This page was updated June 24, 2004.

Here's a key to the markup:
	[page-number]: serious technical mistake
	{page-number}: minor technical mistake
	<page-number>: important language/formatting problem
	(page-number): language change or minor formatting problem
	?page-number?: reader question or request for clarification



Confirmed errors:


(x)  under "Audience" subhead;
"fundamental principals"
should be:
"fundamental principles"


[14]  Example 2-1 in Chapter 2;
Sentence reads, "You can change the name of the output file by using the /out
compiler option:
c:vbc /t:exe /r:hello.dll /out:hello.exe hello-client.vb"

If I use this line command I obtain the file hello.exe.
But when I run it, I receive an exception error.

If I use insteed the line command:
c:vbc /t:exe /r:hello.dll hello-client.vb
I obtain the file hello-client.exe that run with no error.

Is it possible that the problem in the first example depends on the fact that the two
files have same name:
'hello.dll' and 'hello.exe' ?

AUTHOR: This is in fact an error. The original syntax in
the book works...but the /out parameter cannot have
the same assembly name as the /r parameter. So,
something like this is more appropriate (making the
output file called helloworld.exe instead):

C:\>vbc /t:exe /r:hello.dll /out:helloworld.exe
hello-client.vb


{25}  Table2-1;
In my help file, it is stated that the Decimal type is 128 bit, not 96.

AUTHOR: The "decimal" keyword which is used in C# is a 128-bit
integer. The System.Decimal class which corresponds to
the Decimal type in VB.NET is a 96-bit integer. This
is NOT an error in the book, but perhaps some
clarification is in order.


{40}  Private Sub Encrypt();
Private Sub Encrypt()
    '
End Function

should be

Private Sub Encrypt()
    '
End Sub

AUTHOR: Confirmed.


[62]  Example 3-13;
Public Class B
  Public WithEvents myClassA As A
  ...
End Class

should be

Public Class B
  Private WithEvents myClassA As A
  ...
End Class

AUTHOR: Confirmed. The declaration should read:

Private WithEvents myClassA As A


{64}  Private Property MyClassA();
Private Property MyClassA() As A
  Get
      Return _myClassC
  End Get
  Set
      If Not ...
  End Set
End Property

should be

Private Property MyClassA() As A
  Get
      Return _myClassA
  End Get
  Set(ByVal Value As A)
      If Not ...
  End Set
End Property

AUTHOR: Confirmed


{64}  Public Class B;
Public Class B
  Private _myClassA As ClassA

  Public Sub New()
    MyClassA = New C()
    MyClassA.Raise()
  End Sub
End Class

should be

Public Class B
  Private _myClassA As A

  Public Sub New()
    MyClassA = New A()
    MyClassA.Raise()
  End Sub
End Class

AUTHOR: Confirmed.  This is a bug.


[88]  1st Paragraph;

Protected NotOverridable Function IsValidNumber() As Boolean
    'Use Luhn Mod 10 algorithm to validate
    'card number
End Function

Should be:

Protected NotOverridable Overrides Function IsValidNumber() As Boolean
    'Use Luhn Mod 10 algorithm to validate
    'card number
End Function