//end of CollectionReportButton
//Start of StockReportButton
private void StockReportButton_Click(object sender, EventArgs e)
{
this.Hide();
Stock_Report sr = new Stock_Report();
sr.Show();
}
private void button3_Click(object sender, EventArgs e)
{
Stock_Report sr = new Stock_Report();
this.Hide();
sr.startDate = validstartDate;
sr.endDate = validendDate;
sr.Show();
}