checked listbox control

[arkiboys]

There are two of these controls in my windows application.
checking the items in the first one should cause the items in the second control to populate.
At present I use the mouse_leave event on the first control to trigger the event to populate the second control.
Is this the proper event I should use? I do not think the selectedIndex event is the correct one for this purpose either. Any suggestions please?
Thanks

[Deepak Sakpal]

Use ItemCheck event like this:

Private Sub CheckedListBox1_ItemCheck( _
    ByVal sender As Object, _
    ByVal e As System.Windows.Forms.ItemCheckEventArgs _
) Handles CheckedListBox1.ItemCheck
 
    If e.NewValue = CheckState.Checked Then
        MessageBox.Show("Item checked !")
    Else
        MessageBox.Show("Item Un-checked !")
    End If
End Sub