I'm having difficulty understanding DataSets. I created a DataSet within a private void caled Form1_Load

private void Form1_Load(object sender, EventArgs e) {

     DataSet fooBar = new DataSet();
     adapter.Fill(fooBar, "value_" + x);              
     DataRow dRow = fooBar.Tables["ShiftLat_" + x].Rows[0];

How can I call this data from another private void within the form?

For instance when a listBox item is selected the coresponding value us pulled from the dataSet and displayed in the text of a textBox.

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
            shiftLatForm.Text = //cannot figure out what code to use here