Foros del web, para los que viven de bits

Dim cboMio as new combobox

AddHandler cboMio.SelectedIndexChanged, _
        New EventHandler(AddressOf cboMio_SelectedIndexChanged)

Private Sub cboMio _SelectedIndexChanged( _
    ByVal sender As Object, ByVal e As EventArgs)

      'Codigos varios

end sub

private combobox cboMio = new combobox;

((ComboBox) cboMio).SelectedIndexChanged +=
        new EventHandler(cboMio_SelectedIndexChanged);

private void cboMio_SelectedIndexChanged(object sender, EventArgs e)
{
    //Codigo varios
}