Variables -
Primitive & Non-Primitive types
Primitive and Non-primitive (Object) types
Primitive types[Declaration]Dim x As Integer[Usage]x = 1
Non-Primitive types[Declaration]Dim y As TextBox[Instantiation]y = new TextBox( )[Usage]y.Text = "my
name"y.Visible = False
Primitive types
[Declaration]Dim x As Integer
Primitive types
[Usage]x = 1
Non-Primitive types
[Declaration]Dim y As TextBox
Non-Primitive types
[Instantiation]y = New TextBox( )
Non-Primitive types
[Usage]y.Text = "Name"
Primitive and Non-primitive (Object) types
Primitive types[Declaration]Dim x As Integer[Usage]x = 1
Special case:String is not
primitive but is used like one
Non-Primitive types[Declaration]Dim y As TextBox[Instantiation]y = new TextBox( )[Usage]y.Text = "my
name"y.Visible = False
What is TextBox1.Text?
What is TextBox1.Text?
TextBox is a Control provided by Microsoft. It defines a Class with behaviours,
properties and events.=> later we shall use VS 2005 to view
these behaviours, properties and events.
What is TextBox1.Text?
To use the control, we need to declare and instantiate.
In Form1.Designer.vb:
[Declaration]
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
[Instantiation]
Me.TextBox1 = New System.Windows.Forms.TextBox
What is TextBox1.Text?
1) View partial class Form1.Designer.vb2) Right click on TextBox in "New
System.Windows.Forms.TextBox"3) Select Go To Definition
What is TextBox1.Text?
behaviours / methods
properties
events
TextBox1.Text