/// <summary>
/// Create a new child instance of Average Units form and display it
/// </summary>
private void ClickNewAverageUnits(object sender, EventArgs e)
{
// Get the current instance of the AverageUnits form or create a new one if not there
formAverageUnitsShippedByEmployee averageUnits = formAverageUnitsShippedByEmployee.Instance;
// Assign it's MDI parent to be the form this event was called in
averageUnits.MdiParent = this;
// Dispaly the form and set it as the focus
averageUnits.Show();
averageUnits.Focus();
}
/// <summary>
/// When the form is closed release the instance.
/// </summary>
private void AverageUnitsFormClosed(object sender, FormClosedEventArgs e)
{
instance = null;
}