private void btnInvoices_Click(object sender, EventArgs e)
{
if (frmInvoice == null)
{
frmInvoice = new InvoiceForm(DM, this);
}
frmInvoice.ShowDialog();
}
/// <summary>
/// Creates the Invoice window when the Invoice button is clicked
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnInvoices_Click(object sender, EventArgs e)
{
if (frmInvoice == null) // Prevents more than one window is created
{
frmInvoice = new InvoiceForm(DM, this);
}
frmInvoice.ShowDialog(); // Shows the window
}
