The server.object is the name of the activex control you want to use. You can find the class names within your dll by creating a new project in Visual Basic and adding the dll under Project->References then using the Object Browser.
Here's some code I used where I create my object, have it query a stored procedure then I get a oledb record set object:
$pt = new COM('MyDLL.Patient');
$pt->SetConnectString(CONNECT_STRING);
$pt -> Lookup();
// Lookup the patient info
$rs = $pt->GetRecordset();
Hope this helps, if your still having trouble, check out http://www.ciwbootcamp.com. They do a great job teaching this stuff.