Handling multiple comboboxs and selected index changed events...

[Niya]

As Jmc says use the sender parameter in the event handler like:-

'
    Private Sub cmbA_DropDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmbA.DropDown,cmbB.DropDown, cmbC.DropDown
        Dim cmb As ComboBox = DirectCast(sender, ComboBox)
 
        cmb.SelectedIndex = -1
        cmb.Items.Clear()