Want to achieve after choosing any one province, the contents of a text section shows real-time change

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Writing in the click
If ctype (sender, RadioButton.) Ckecked=True then
TextBox1. Text=ctype (sender, RadioButton.) the Text

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Here is like that, I have 31, is a click each button to add the trigger

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The comboBox, a local

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Can write with the parameters of the object in a click sender judgment which selected

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Can you give me the reference code

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Public Class Form1 

Private Sub Form1_Load (ByVal sender As System. Object, ByVal e the As System. EventArgs) Handles MyBase. Load 
'all RadioButton within enumeration GroupBox1 
'will CheckedChanged events are bound to the Group1_RadioButton_CheckedChanged function 
For Each Item As Control In GroupBox1. Controls, 
If the Item. GetType=GetType (RadioButton) Then 
AddHandler TryCast (Item, RadioButton). CheckedChanged, AddressOf Group1_RadioButton_CheckedChanged 
End the If 
Next 
End Sub 

'all RadioButton CheckedChanged events within the group in response to this 
Private Sub Group1_RadioButton_CheckedChanged (ByVal sender As System. Object, ByVal e the As System. EventArgs) 
TextBox1. Text=TryCast (sender, RadioButton.) Text 
End Sub 

The End of the Class