I think I got it It did not like the space between the words "Report Name"
changed it to "Report_Name"

All controls are numbered if you add them from the tool box.

The reason many (most?) text boxes aren't numbered is because they're
created as bound controls, so pick up the name of the recordset field to
which they're bound.

That having been said, it's generally recommended that you rename all
controls to give them meaningful names. Does Combo0 tell you anything about
what's displayed in the control? Of course not. That's why you'd rename the
control to something like cboReportNames

Select the text box of interest to you, and look at the Properties tab.
That'll not only give the name of the control, but it'll also let you
associate code with it: look on the Events tab, set the On Dbl Click
property to [Event Procedure] then click on the ellipsis (...) to the right
of the property. That'll take you into the VB Editor, in the middle of

Private Sub NameOfControl_DblClick(Cancel As Integer)

End Sub

Try

Private Sub Report_Name_DblClick(Cancel As Integer)
DoCmd.OpenReport Me.Report_Name, acViewPreview
End Sub

Better yet try editing the name of the control to txtReportName and then use

DoCmd.OpenReport Me.txtReportName, acViewPreview