private void btnnew_Click(object sender, EventArgs e)
{
SalesReturn frm = new SalesReturn();
frm.MdiParent = this.MdiParent;
frm.StartPosition = FormStartPosition.CenterScreen;
frm.Show();
}
private void LVDayBook_MouseDoubleClick(object sender, MouseEventArgs e)
{
String str = LVDayBook.Items[LVDayBook.FocusedItem.Index].SubItems[0].Text;
SalesReturn bd = new SalesReturn(this);
bd.updatemode(str, LVDayBook.Items[LVDayBook.FocusedItem.Index].SubItems[0].Text, 1);
bd.Show();
}