Check Colin's article Exploring and Extending Report Previewing in VFP9

Basically you can instantiate a preview container and configure it the way you like

loPC = NULL
DO (_REPORTPREVIEW) WITH loPC
loPC.ToolbarIsVisible = .T.
loRL = CREATEOBJECT("ReportListener")
loRL.ListenerType = 1
loRL.PreviewContainer = loPC
lcReport = HOME(2) + "Solution\Reports\wrapping.frx"
REPORT FORM (lcReport) OBJECT loRL

>the only time RESOURCE is turned on is when the user is previewing reports. This is done so that the view settings are remembered and the user doesn't have to re-size the preview window each time. In our software the users use report preview more than they print reports and they have all sizes of monitors. We also re-size _SCREEN to the max monitor resolution during the preview.
>