Hi Alp.

>When implementing report listener, as follows:
>
>

>oListener = CreateOBJECT('rlswap')
>oListener.strFilter = strfilter
>oListener.PreviewContainer = Thisformset.frmDisplay
>Report Form (Thisformset.strReportName) Object oListener
>

>
>the rendered report never displays in form specified by preview container.

First, did you try setting oListener.ListenerType to 1 (preview)? Second, does Thisformset.frmDisplay reference a form that has the correct interface (not user interface, but properties and methods) that would allow it to act as a report preview window?

Doug