private void btn_cadastro_Click(object sender, EventArgs e)
{
frm_cadcliente form_cadcliente = new frm_cadcliente();
form_cadcliente.Show();
}
private void dataGridView1_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
{
frm_cadcliente form_cadcliente = new frm_cadcliente(dataGridView1.SelectedRows[0].Cells["idclientes"].Value.ToString());
form_cadcliente.Show();
}