private void limpia()
{
this.txtfac.Text = "";
this.txtdestino.Text = "";
this.txtnit.Text = "";
this.txtdireccion.Text = "";
this.txttelefono.Text = "";
this.txtmaterial.Text = "";
this.txtmetros.Text = "";
this.txtvaloru.Text = "";
this.txtsubt.Text = "";
this.txtivap.Text = "";
this.txtiva.Text = "";
this.txtretef.Text = "";
this.txtretefp.Text = "";
this.txtneto.Text = "";
Cbid_estadof.Focus();
// cbtipo.Focus();
}
private void bt_nuevo_Click(object sender, EventArgs e)
{
this.txtfac.Text = "";
this.txtdestino.Text = "";
this.txtnit.Text = "";
this.txtdireccion.Text = "";
this.txttelefono.Text = "";
this.txtmaterial.Text = "";
this.txtmetros.Text = "";
this.txtvaloru.Text = "";
this.txtsubt.Text = "";
this.txtivap.Text = "";
this.txtiva.Text = "";
this.txtretef.Text = "";
this.txtretefp.Text = "";
this.txtneto.Text = "";
// this.txt_idR.Text = "";
Cbid_estadof.Focus();
// cbtipo.Focus();
// cbApartado.Focus();
}
