Controlling Child Window in IE

I have been searching for a while for a program to control a popup window (child window) when I click on a search button on the parent page. I keep coming back to the following code.

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However, I cannot get it to work. I am putting it in a class module and loading Microsoft Internet Controls and HTML Objects Library. I keep getting an error message that the program isn't hooked to IE. When does the program above "hook" to the child window so it can be manipulated? How do I run all of the code above... i.e. there are multiple programs? Where do I put code to control the child window???