private void btn_alterContract_Click(object sender, EventArgs e)
{
frm_AlterContract newAlterCustomer = new frm_AlterContract(DGVContract);
newAlterCustomer.Show();
}
private void btn_alterAppointment_Click(object sender, EventArgs e)
{
frm_AlterContract frm_newAlterContract = new frm_AlterContract(currAppointment);
frm_newAlterContract.Show();
}