New Post: New to NetOffice need to find value and update column

I need to develop a quick application to interact with excel. I have a brief look at the examples but could not see how to.

1. select a spreadsheet page (tab)
2. Find a value in a column on a page.
   

Would love some direction on where to find an example or what I use to do the above tasks.

Outline of the task I have to do.

Open an existing spreadsheet.
Find a value in a column on a page (tab)
Update/add a value to a column in the same row.
When completed save sheet.

Many thanks for any replys.