Thank you Imar and Doug, now I understand a little better.

What does this line of code do?

Else
lblResult.Text = String.Empty

Do I still need this?

It sets the Text to an empty string, effectively clearing the label. You may need it to clear any (good or bad) result from a previous postback.

Cheers,

Imar
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Imar Spaanjaars
http://Imar.Spaanjaars.Com
Everyone is unique, except for me.
Author of Beginning ASP.NET 3.5 : in C# and VB, ASP.NET 2.0 Instant Results and Dreamweaver MX 2004
While typing this post, I was listening to: Special Cases by Massive Attack (Track 4 from the album: 100th Window) What's This?

Hi there,
I am actually lost.
on page 170 on C# here is new myCalculator thing.
Did I miss it somewhere else? I can not see this myCalculator anywhere else before.
if it is there could you please show me. because of it, code is not working.
thank you

Hi there,

The Caluclator is instantiated on the very first line at page 170 (C#) or at page 169 (VB):

VB
Dim myCalculator As New Calculator()

C#
Calculator myCalculator = new Calculator();

The Calculator class itself is shown at page 168 (created in step 4 of the Try It Out).

So, I am not sure what exactly you're missing.

Imar

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Imar Spaanjaars
http://Imar.Spaanjaars.Com
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Author of Beginning ASP.NET 4.5 : in C# and VB, Beginning ASP.NET Web Pages with WebMatrix
and Beginning ASP.NET 4 : in C# and VB.
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