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  Visual Basic 2010 Programmer's Reference: Updates  
 
Overview Table of Contents Source Code
Updates Wrox Forum Info at Wrox.com
All Editions Sample Chapters
 
 
 

No project of this size can be completely without errors and this is no exception. It's sort of like writing a 300,000 word Visual Basic program without the benefit of a compiler to check your spelling and grammar. This page describes some improvements to the example programs and the mistakes found so far. If you find other errors, please let me know.

PageDetails
xliiProf. Chin (CVibes.net) noticed that the last sentence in the second paragraph basically says that assembly language is a lot better than assembly language. It should say, "It's a lot better than machine language ..."
8Don Williamson noticed that the second paragraph's first sentence refers to Figure 1-2 but it should refer to Figure 1-4.
112Howard Smith noticed that the last line before the "Displaying Graphics" section says "Timer event" when it should say "Tick event."
320Don Williamson noticed that the table at the top of the page lists the subtraction operator as "2" instead of "-". (That's so wrong it's almost silly.)

On the same page in the "Calculator Cleverness" box, the instructions say to select the View menu's Scientific command. On my computer that's what it's called but Don says on his the command is labeled Programmer. It may say Programmer on your system, too.

331Don Williamson noticed that the meaning column in the table for the op_Equality entry says "True if date1 > date2" but it should say "True if date1 = date2."
Chapter 37Casey Jones found that Chapter 37's InvalidCharacters program did not display some whitespace and control characters correctly. Here's some code that displays these non-printable characters by showing their numeric equivalents.

Dim txt As String = ""
For Each ch As Char In Path.GetInvalidFileNameChars()
    If Char.IsWhiteSpace(ch) OrElse Char.IsControl(ch) Then
        txt &= "<" & Asc(ch) & "> "
    Else
        txt &= ch & " "
    End If
Next ch
lblInvalidFileNameChars.Text = txt

txt = ""
For Each ch As Char In Path.GetInvalidPathChars()
    If Char.IsWhiteSpace(ch) OrElse Char.IsControl(ch) Then
        txt &= "<" & Asc(ch) & "> "
    Else
        txt &= ch & " "
    End If
Next ch
lblInvalidPathChars.Text = txt

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  Visual Basic 2010 Programmer's Reference: Updates  
 
Overview Table of Contents Source Code
Updates Wrox Forum Info at Wrox.com
All Editions Sample Chapters
 
 
 

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