As you can see the source code of indicators Wealth-Lab? I use Microsoft Visual Studio 2008. There are certain objects and classes. A source code for it.

Since you already see some "objects and classes", you must have already installed and probably using the application. But then, why haven't you taken a free 30-day trial of Wealth-Lab Developer 5? Note that WLP5 is not available in your region, and we only support legitimate trial users and customers, not copies obtained from the informal resources. Hope it's clear.

To answer your question, Wealth-Lab is not an open source application and hence, there's no way to see the source code of WealthLab.Indicators w/o breaking the EULA.

Thank you for your reply.

My region - Russia, I am a legitimate trial user?

You haven't started a free trial of Developer 5 yet, but will be, once you do.