Launching out-process components from web

Hi,

I have written two out-process components (Activex Exes) using Vb6.

These components i need to integrate in Web.

When user user selects some files on web listing at our site, and clicks download I need to check whether the component is installed in client machine or not. If installed in client machine, i need to lauch the downloader activex exe by setting parameters. Samething for upload component. If component is not installed, i need to lauch the setup and then access the activexe to launch it.
how can i achieve this ?

and How to pass information from web to the actiex exe ? is it only through properties and functions ?

and how to know already component is installed or not ? if installed how to access directly?

And my compoent always should run only one instance. not multiple instances. Either access from client application or from web it should access single instance.

I dont know much web programming.
if anybody has some sample or good idea of achieving this please let me know.


Thanking you

Praveen