Yu can surely do that. There are two different things to consider here: starting the application from VB6 and pulling information from it with VB6.
Starting the application is as easy as using a WebBrowser control and point it to the default page on your Web app. Pulling information from it may require that the ASP.NET app delivers information in a VB6-friendly way, such as a text stream.
So, the VB6 app can simply do a request (HTTP GET) for a Web page (say GetFilledForms.aspx) and get the results as a string. The ASP.NET page can perform Response.Write calls to generate the output.
This was first published in February 2004