How to automate clicking a button and selecting a cell from table in a desktop application(built on .net) using UFT

I'm using record and run feature of UFT to automate my application. However, object often changes and sometime it doesn't even recognize the right object. So, I want to automate using descriptive programming but unsure how to start like how my code can communicate with the application. I'm very new to this tool and coding. So far I only defined small function just to invoke the application. If I can get a code snippet on how to simply click the button available in my application(Again, which is a desktop application and not web) then I can go ahead and follow the same norms and automate since that would be more robust and I will get to learn VB Script.

Thanks in advance!