Opening reports using button

[emdiesse]

How can I open reports in the report viewer using abutton.

This prints the form. I want to open it.

Private Sub btnOpenSummary_Click()
    DoCmd.OpenReport ("rptSummary")
End Sub

Thanks

 

[Sergeant]

DoCmd.OpenReport "rptSummary", acViewPreview

 

[emdiesse]

DoCmd.OpenReport "rptSummary", acViewPreview

Thank you. How about if I were to use this for my buttons code?

I was hoping to open this form within a subform view if possible
Private Sub btnrptOrderList_Click()
Forms("frmIndex").IndexFrame.SourceObject = "rptOrderList"
End Sub