Really need some help...hoping somebody can help me.

I know how to save my reports as source code (File > Save As > VB Class *.vb)
I have now added these classes to a class library and complied as a DLL (called Reportlist)...all good here.
I have added the DLL to my main project.
Can somebody please tell me how I can call and show (preview) or export the report

I was going to use code like:
Dim report As StiReport = new Reportlist.Reports.HSO
Is this correct? and how do I then load the report or export it?
My DLL is called Reportlist and the namespace is called reports and the class HSO
Thanks