C#

private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
    // make sure that the click was in the right column
    if (e.ColumnIndex == 1)  // I used 1 here because I didn't put a column for FoodType, you should use 2.
    {
        // Give it a value in case the cell is empty
        string cellContent = "0";
        if (this.dataGridView1[e.ColumnIndex, e.RowIndex].Value != null)
        {
            cellContent = this.dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString();
        }

        using (InputBox ib = new InputBox("Enter new stock amount:", this.dataGridView1[0, e.RowIndex].Value.ToString(), cellContent))
        {
            if (ib.ShowDialog() == DialogResult.OK)
            {
                this.dataGridView1[e.ColumnIndex, e.RowIndex].Value = ib.Result;
                cellContent = ib.Result;
            }
        }
    }
}

public partial class InputBox : Form
{
    public InputBox(string text, string caption, string defaultValue)
    {
        //
        // The InitializeComponent() call is required for Windows Forms designer support.
        //
        InitializeComponent();

        this.Text = caption;


        Size size;
        using (Graphics g = this.CreateGraphics())
        {
            Rectangle screen = Screen.PrimaryScreen.WorkingArea;
            SizeF sizeF = g.MeasureString(text, lblPrompt.Font, screen.Width - 20);
            size = sizeF.ToSize();
            size.Width += 4;
        }

        if (size.Width < 200)
        {
            size.Width = 200;
        }
        Size clientSize = this.ClientSize;
        clientSize.Width += size.Width - lblPrompt.Width;
        clientSize.Height += size.Height - lblPrompt.Height;
        this.ClientSize = clientSize;
        lblPrompt.Text = text;
        txtResult.Text = defaultValue;
        this.DialogResult = DialogResult.Cancel;
    }

    void CancelButtonClick(object sender, System.EventArgs e)
    {
        result = null;
        this.Close();
    }

    void AcceptButtonClick(object sender, System.EventArgs e)
    {
        this.DialogResult = DialogResult.OK;
        result = txtResult.Text;
        this.Close();
    }

    string result;

    public string Result
    {
        get
        {
            return result;
        }
    }
}

===============================================================
FoodName     FoodType     Qty In Stock     Status
===============================================================
Olives       Starter      0                <Allways on Stock>
Soup         Starter      0                <Allways on Stock>
etc...       etc...       etc...           etc...
===============================================================

===============================================================
FoodName     FoodType     Qty In Stock     Status
===============================================================
Olives       Starter      0                <Allways on Stock>
Soup         Starter      10               <Controlled>
etc...       etc...       etc...           etc...
===============================================================

===============================================================
FoodName     FoodType     Qty In Stock     Status
===============================================================
Olives       Starter      0                <Allways on Stock>
Soup         Starter      0                <Allways on Stock>
etc...       etc...       etc...           etc...
===============================================================

===============================================================
FoodName        FoodType     Qty In Stock     Status
===============================================================
Olives          Starter                     
Soup            Starter                     
Caprese	        Starter
Bruschetta	Starter
Mushroom	Starter
Antipasto	Starter
Scallops	Starter
Calamari	Starter
Crab Avocado	Starter
Pizza Bread	Starter
===============================================================

=================================================================
FoodName        FoodType     Qty In Stock     Status
=================================================================
Olives          Starter      0                Allways On Stock
Soup            Starter      0                Allways On Stock
Caprese	        Starter      0                Allways On Stock
Bruschetta	Starter      0                Allways On Stock
Mushroom	Starter      0                Allways On Stock
Antipasto	Starter      0                Allways On Stock
Scallops	Starter      0                Allways On Stock
Calamari	Starter      0                Allways On Stock
Crab Avocado	Starter      0                Allways On Stock
Pizza Bread	Starter      0                Allways On Stock
=================================================================

private DataGridViewTextBoxColumn ColFoodQtyStock = new DataGridViewTextBoxColumn();
        private DataGridViewTextBoxColumn ColFoodStatus = new DataGridViewTextBoxColumn();

        private void cmdStarters_Click(object sender, EventArgs e)
        {
            OleDbConnectionStringBuilder connBuilder = new OleDbConnectionStringBuilder();
            connBuilder.DataSource = @"C:\Users\AP_AE\Desktop\DTPOS_APP\DataBase\DtposMenu.accdb";
            connBuilder.Provider = "Microsoft.ACE.OLEDB.12.0";
            connBuilder.Add("Jet OLEDB:Engine Type", "5");

            // Food SQL Query
            string foodTypeSql = @"SELECT FoodName, FoodType FROM Food WHERE FoodType = @foodType";
            using (OleDbConnection conn = new OleDbConnection(connBuilder.ConnectionString))
            {
                dataGridView1.Columns.Clear();
                dataGridView1.RowTemplate.Height = 60;
                //====================================\\
                dataGridView1.Visible = true;
                dataGridView2.Visible = false;
                try
                {
                    OleDbCommand foodsCommand = new OleDbCommand(foodTypeSql, conn);
                    OleDbParameter foodType = foodsCommand.Parameters.Add("@foodType", OleDbType.VarChar, 15);
                    OleDbDataAdapter foodsDa = new OleDbDataAdapter(foodsCommand);
                    //DataRow dr;
                    DataSet ds = new DataSet();
                    conn.Open();
                    foodType.Value = "Starter";
                    foodsDa.Fill(ds, "Food_table");
                    
                    //conn.Close();
                    dataGridView1.DataSource = ds;
                    dataGridView1.DataMember = "Food_table";

                    dataGridView1.Columns.AddRange(ColFoodQtyStock, ColFoodStatus);
                    
                    DataGridViewCellStyle dataGridViewCellStyle1 = new DataGridViewCellStyle();
                    this.dataGridView1.ColumnHeadersDefaultCellStyle = dataGridViewCellStyle1;
                    dataGridViewCellStyle1.Font = new Font("Verdana", 20.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

                    this.dataGridView1.Columns[0].Width = 420;
                    this.dataGridView1.Columns[1].Width = 180;
                    this.dataGridView1.Columns[2].Width = 300;
                    this.dataGridView1.Columns[3].Width = 308;

                    // ColStatus 
                    ColFoodStatus.HeaderText = "Status";
                    ColFoodStatus.Name = "ColFoodStatus";

                    // ColQtyStock
                    ColFoodQtyStock.HeaderText = "Quantity In Stock";
                    ColFoodQtyStock.Name = "ColFoodQtyStock";
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Error: " + ex);
                }
            }
        }