private void btmOK_Click(object sender, EventArgs e)
{
this.btmOK.Enabled = false;
this.iiInsert.dblAmount = InvoiceItem.GetNewSupply(this.cnConnection, this.iiInsert.strEquipStorecode, double.Parse(this.tbAmount.Text.Trim()));
this.iiInsert.dblPrice = double.Parse(this.tbPrice.Text.Trim());
iiInsert.Insert(this.cnConnection);
InvoiceItems frmInvoiceItems = (InvoiceItems)this.Owner;
frmInvoiceItems.SearchInvoiceItems();
this.Close();
}