private void BtnPrintInvoiceReport_Click(object sender, System.EventArgs e)
{
WaitingForm.Show("Print Invoice Report");
this.Enabled = false;
BusinessService.BusinessService service = new BusinessService.BusinessService();
service.PrintInvoiceReport(DateInvoiceReport.Value, ((MainForm)MdiParent).User.EmployeeTypeID);
this.Enabled = true;
WaitingForm.HideForm();
}
