Authenticating from Classic ASP to LSF9

We have the need to integrate one of our ASP applications with Lawson. and to do so we need to first authenticate to lawson portal and then make the AGS call. I was going thru the LSF9 document - "Doc for Developers: IOS Application Program Interfaces" chapter "Authenticating Programmatically to Lawson"... but it only explains how to do it for Java clients using lhc.jar. Since our app is a ASP app, we won't be able to use this method. Can anyone please share how to accomplish it in Classic ASP environment? Thanks.