Hello,
There is a feature in LabVIEW, called property node. With property node you can programatically change front panel objects. You can make property node with right-clicking on object you want to change programatically, and go Create>Property Node and then you have all the properties of selected object you can change programatically. When you created property node, you can change access (read/write) with right click, and then you choose Change All To Write or Change All To Read, depending on what you have selected.
In your case you will need 3 properties:
Active Cell > Active Column Number - sets/reads active column number
Active Item > Row Number - sets/reads active column number
Active Cell > String - sets/reads the item's string
If you still have any questions fell free to ask.
Regard,
Gregor Cerne
