private void btnAdd_Click(object sender, EventArgs e)
        {
            FrmAddCliente fed = new FrmAddCliente();

            this.Hide();
            fed.ShowDialog();
        }
        private void btnEdit_Click(object sender, EventArgs e)
        {
            int           rowindex    = dataGridClientes.CurrentCell.RowIndex;
            int           columnindex = dataGridClientes.CurrentCell.ColumnIndex;
            FrmAddCliente fed         = new FrmAddCliente();

            this.Hide();
            fed.values = Int32.Parse(dataGridClientes.Rows[rowindex].Cells[columnindex].Value.ToString());
            fed.ShowDialog();
        }