Public Overrides Property SelectedIndex As Integer

Dim instance As LiveCheckBoxList
Dim value As Integer
 
instance.SelectedIndex = value
 
value = instance.SelectedIndex

public override int SelectedIndex {get; set;}

public:
property int SelectedIndex {
   int get() override;
   void set (    int value) override;
}

'In this example, items are added to a Live List using Items.Add
'The items are sounds to be played, located in a "sounds" folder
'When one of the items is selected, the corresponding sound is played
'LiveList1 could be a LiveListBox, LiveDropDownList, LiveRadioButtonList or LiveCheckBoxList

Private Sub LiveButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LiveButton1.Click
    'Add items to the Live list control via the ListItemCollection
    LiveList1.Items.Add("chord.wav")
    LiveList1.Items.Add("chimes.wav")
    LiveList1.Items.Add("exclamation.wav")
    LiveList1.Items.Add("error.wav")
End Sub

Private Sub LiveList1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LiveList1.SelectedIndexChanged
    'When an item in the LiveList is selected or de-selected
    'The selected sound that is topmost in the list will play
    If (LiveList1.SelectedIndex > -1) Then
        LiveSound1.Source = "sounds/" + LiveList1.Items(LiveList1.SelectedIndex).ToString()
        LiveSound1.Play()
    End If
End Sub

//In this example, items are added to a Live List using Items.Add
//The items are sounds to be played, located in a "sounds" folder
//When one of the items is selected, the corresponding sound is played
//LiveList1 could be a LiveListBox, LiveDropDownList, LiveRadioButtonList or LiveCheckBoxList

private void LiveButton1_Click(object sender, System.EventArgs e)
{
	//Add items to the Live List control via the ListItemCollection
	LiveList1.Items.Add("chord.wav");
	LiveList1.Items.Add("chimes.wav");
	LiveList1.Items.Add("exclamation.wav");
	LiveList1.Items.Add("error.wav");
}

private void LiveList1_SelectedIndexChanged(object sender, System.EventArgs e)
{
	//When an item in the Live List is selected or de-selected
	//The selected sound that is topmost in the list will play
	if (LiveList1.SelectedIndex > -1)
	{
		LiveSound1.Source = "sounds/" + LiveList1.Items[LiveList1.SelectedIndex];
		LiveSound1.Play();
	}
}