private void btnBan_Click(object sender, EventArgs e)
{
//
frmBanhang frm = new frmBanhang();
Handling.FormHandling.PreventFormMultipleTimes(frm, "Bán hàng");
Close();
//
}
private void btnBanHang_Click(object sender, EventArgs e)
{
if (frmBanHang == null)
{
frmBanHang = new frmBanhang();
Handling.FormHandling.PreventFormMultipleTimes(frmBanHang, "Bán hàng");
}
else
{
frmBanHang.Close();
frmBanHang = null;
}
//frmBanhang frm = new frmBanhang();
//Handling.FormHandling.PreventFormMultipleTimes(frm, "Bán hàng");
}