ComboBox Control in VB.Net
ComboBox is a combination of a TextBox and a ListBox.
How use the ComboBox Control
Drag and drop ComboBox from toolbox on window Form.

Code:
'Here Item is
added in combobox on form load
Private
Sub Form1_Load(ByVal
sender As System.Object,
ByVal e As
System.EventArgs) Handles
MyBase.Load
ComboBox1.Items.Add("C#")'Add the First item in ComboBox
ComboBox1.Items.Add("J#")
ComboBox1.Items.Add("VB")
ComboBox1.Items.Add("Java")
End Sub
'Here show the
selected item in Label2 on ComboBox SelectedIndexChanged event
Private Sub
ComboBox1_SelectedIndexChanged(ByVal sender
As System.Object, ByVal
e As System.EventArgs)
Handles ComboBox1.SelectedIndexChanged
' Assign the selected item in label
Label2.Text = "You selected " +
ComboBox1.SelectedItem
End Sub
In above code Item is added dynamically so all
Item in
ComboBox1 will
show at run time.
Run the project

When you select the given option then SelectedIndexChanged event will fire and
selected item will show in the messagebox.

How set the AutoCompleteSource Properties
Choose AutoCompleteSource property of
ComboBox is ListItem and also set AutoCompleteMode to suggest, append, or SuggestAppend.

When you type any text in the ComboBox then it searches the related item and if
related item is available then it suggest the related item.

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