There are some things you can do with $com() and a webbrowser component, though it's more or less useless because of the string too long limit in mIRC. There are also ways to use VBscript etc, though before we get there, you're gonna have to be a bit more specific about what you are planning to do.
thanks for the reply. i want to try and sign into my net passport using com objects, its basically a messenger application im working on. it can be done by sockets but i want to test it with com objects, any ideas?
There are some COM objects like the XMLHTTP one, and the WINHTTP one, which allow you to make HTTPS connections, that will probably help you on your way.
Someone once posted some code that uses the winhttp progid here
You can find documentation on MSDN for this object here
To the OP i very much doubt its possible to put a VB Control on to a mIRC Dialog. It requires really specific api calls and i doubt a COM object is actually built for that purpose.