C # Programacion

using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace autozone
{
public partial class frmmenu : Form
{
public frmmenu(){
InitializeComponent();
}





private void btnregm_Click_1(object sender, EventArgs e)
{
Form g = new frmlogin();g.Show();
this.Hide();
}

private void btnproveedores_Click(object sender, EventArgs e)
{
Form g = new frmproveedores();
g.Show();this.Hide();
}

private void btnfacturas_Click(object sender, EventArgs e)
{
Form g = new frmfacturas();
g.Show();this.Hide();
}

private void btnhardparts_Click(object sender, EventArgs e)
{
Form g = new frmhardparts();
g.Show();
this.Hide();}

private void btnclientes_Click(object sender, EventArgs e)
{
Form g = new frmclientes();
g.Show();
this.Hide();
}}
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
usingSystem.Windows.Forms;

namespace autozone
{
public partial class frmhardparts : Form
{
string año, marca, modelo, motor, parte;
public frmhardparts()
{InitializeComponent();
btnnuevohp.Enabled = true;
btnguardarhp.Enabled = false;
btnborrarhp.Enabled = false;
btnbuscarhp.Enabled = true;btnmodificarhp.Enabled = false;
btncancelarhp.Enabled = false;
btnreghp.Enabled = true;
cboañohp.Enabled = false;
cbomarcahp.Enabled =...