Access to child objects, using C# .NET, via TestComplete API

We are trying to access a Windows application (target application) from a (MS Visual Studio) C# .NET application (source application) in order to identify the child windows present (in the target application).

Once the children have been identified, we want to execute specific TestComplete (Keyword) test scripts.

The child windows are visible in the Object Explorer of TestComplete.

How do we get access to these child objects, using C# .NET, via the TestComplete API?