private void OnbtnQuanLyKhachHang_MouseClick(object sender, MouseEventArgs e)
{
if (!IsOpened("frmQuanLyKhachHang"))
{
frmQuanLyKhachHang quanlykhachhang = new frmQuanLyKhachHang();
quanlykhachhang.MdiParent = this;
quanlykhachhang.Name = "frmQuanLyKhachHang";
quanlykhachhang.Show();
}
}
private void btKhachHang_Click(object sender, EventArgs e)
{
frmQuanLyKhachHang frmQLKH = new frmQuanLyKhachHang();
frmQLKH.Show();
}