If you place a custom ActiveX control on a Web page like that:

<OBJECT ID="MyActiveXControl"
CLASSID="CLSID:22222AA22-3333-DDDD-SSSS-2222222"
CODEBASE="MyControl.CAB#version=1,0,0,7"
width="578" height="298">
</OBJECT>

, your ActiveX control (MyActiveXControl in this case) should be installed
in "Downloaded Program Files" and registered automatically. The CODEBASE
entry is used
to specify where to download your control from if the end user doesn't have
it yet
or the version of the control is newer.

Oleg