[delphi-en] handle child form

[singh_chandra_bhan]

I want to access the properties of a child form of an application
from
another application.
Properties means I want to perform some action on the visibility of
the child form.

I have the class name of the main form and its child form.
I have the handle of both the parent and child form(using
FindWindow).

I came to know abt the properties of the form and its child form from
TestComplete.

How to proceed?
Plz help me out.