C# :: Opening / Finding And Reading A Value From Excel

I'm attempting to write a method that opens a file from Excel, finds a value within the spreadsheet and returns the value from another column along that row.

So I know I want to pass in the filename and the item I'm initially searching for, plus also a column identifier and that way I can locate so something like this:

public static int GetParameter(string filename, string parameter, string channel)

I've attached a snip of the spreadsheet so you can see what I'm lokoing at. I want to open the spreadsheet, find the parameter I've specified, move along the column to find the channel I've specified and finally read and return the value.

The bit that's troubling me is I have no idea how to work with excel in c#. I've done a few searches and I believe I need to add thiese references

using DocumentFormat.OpenXml.Spreadsheet;
using DocumentFormat.OpenXml.Office2010.Excel;
using DocumentFormat.OpenXml.Office.Excel;
using Excel = Microsoft.Office.Interop.Excel;
using Excel;

I have added those usings and also made reference to them in my project. I was also looking at this as well but it just confuses me in how I add my parameters and modify the code to suit:

using System;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel;
namespace WindowsApplication1 {
public partial class Form1 : Form {
public Form1() {
InitializeComponent();

[Code] ....