private void btnKhachHang_ItemClick(object sender, ItemClickEventArgs e)
{
fKhachHang f = new fKhachHang();
f.MdiParent = this;
f.Show();
}
private void mtKhachHang_Click(object sender, EventArgs e)
{
fKhachHang form = new fKhachHang();
this.Hide();
form.ShowDialog();
this.Show();
}
public static fKhachHang khoitao()
{
if (check == false)
{
check = true;
KH = new fKhachHang();
}
else
{
KH.Activate();
}
return(KH);
}
