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because the sender is a non typed Object, so you MUST tell the compiler that it is of a specific kind for using its methods.<br />
This function can handle more than one kind of sender, so the nature of the sender can be different and also its methods 
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because the sender is a non typed Object, so you MUST tell the compiler that it is of a specific kind for using its methods.
This function can handle more than one kind of sender, so the nature of the sender can be different and also its methods

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I am studying for the MCAD 70-306 exam, using Gunderloy. I notice that he often has code such as the following:<br />
<br />
Private Sub dudColor_SelectedItemChang<wbr />ed( &nbsp;ByVal sender As System.Object, &nbsp;ByVal e As ystem.EventArgs) _<br />
&nbsp;Handles dudColor.SelectedItemChang<wbr />ed<br />
&nbsp; &nbsp; ' Typecast the object to DomainUpDown<br />
&nbsp; &nbsp; Dim dudCol As DomainUpDown = &nbsp;CType(sender, DomainUpDown)<br />
&nbsp; &nbsp; ' Change color of lblsampleText to selected color<br />
&nbsp; &nbsp; lblSampleText.ForeColor = Color.FromName(dudCol.Text<wbr />)<br />
End Sub<br />
<br />
<br />
My question is, since you have access to dudColor, why bother with <br />
<br />
&nbsp; &nbsp; Dim dudCol As DomainUpDown = &nbsp;CType(sender, DomainUpDown) ???<br />
<br />
Why can't you, or shouldn't you, &nbsp;just write:<br />
<br />
&nbsp;lblSampleText.ForeColor = Color.FromName(dudColor.Te<wbr />xt) ???<br />
<br />

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I am studying for the MCAD 70-306 exam, using Gunderloy. I notice that he often has code such as the following:

Private Sub dudColor_SelectedItemChanged(  ByVal sender As System.Object,  ByVal e As ystem.EventArgs) _
 Handles dudColor.SelectedItemChanged
    ' Typecast the object to DomainUpDown
    Dim dudCol As DomainUpDown =  CType(sender, DomainUpDown)
    ' Change color of lblsampleText to selected color
    lblSampleText.ForeColor = Color.FromName(dudCol.Text)
End Sub


My question is, since you have access to dudColor, why bother with 

    Dim dudCol As DomainUpDown =  CType(sender, DomainUpDown) ???

Why can't you, or shouldn't you,  just write:

 lblSampleText.ForeColor = Color.FromName(dudColor.Text) ???



why &quot;CType(sender,....&quot;, instead of the object, itself?

Visual Basic is Microsoft’s event-driven programming language and integrated development environment (IDE) for its Component Object Model (COM) programming model. It is relatively easy to learn and use because of its graphical development features and BASIC heritage. It has been replaced with VB.NET, and is very similar to VBA (Visual Basic for Applications), the programming language for the Microsoft Office product line.

why &quot;CType(sender,....&quot;, instead of the object, itself?

why "CType(sender,....", instead of the object, itself?