Hi,
> Why value, or what exactly it means [...]
Tools by SmartBear have excellent documentation available online and offline. This documentation is really worth reading and this is the reason of why replies on this forum quite often reference this or that help topic. For this particular case, reading documentation for .Find()/.FindChild() method had to made it clear what is the 'value' and 10 parameters.
> but now I should write a script
The easiest and fastest way is to turn on (script) recording in TestComplete, record required actions and analyze the recorded result. Use Object Browser in TestComplete to understand what and why was recorded. Then modify recorded code as per your needs.
As I already wrote, exact implementation depends on the design of your tested web page. And until you let us know its structure, no one will likely provide you with the code sample.
Right now, your request sounds like 'How to drive?'. While there is a small chance that someone will describe how to drive a bike and a car and a truck and F1 bolide, and a yacht, most likely that first you will be asked to let the guys know what exactly would you like to drive, will you drive for yourself or as a professional driver, etc.
So, read referenced help topics, check videos from the https://support.smartbear.com/screencasts/testcomplete/ page, try recording and examine the tested page using Object Browser.