.NET - How do I retrieve specific items out of a Dataset?

I have the following code which connects to a database and stores the data into a dataset.

What I need to do now is get a single value from the data set (well actually its two the first row column 4 and 5)

OdbcConnection conn = new OdbcConnection();
    conn.ConnectionString = ConfigurationManager.ConnectionStrings["ConnectionString2"].ConnectionString;

    DataSet ds = new DataSet();

    OdbcDataAdapter da = new OdbcDataAdapter("SELECT * FROM MTD_FIGURE_VIEW1", conn);

    da.Fill(ds)

So, I need to get two specific items and store them into ints, the psudo code would be

int var1 = ds.row1.column4
int var2 = ds.row1.column5

Any ideas on how I can do this?

Also, can some one shed a light on data tables too as this may be related to how I'm going about doing this.