OleCMD - dont prompt option ignored

why am I getting saveas dialog prompt from the following code
Dim doOpt As SHDocVw.OLECMDEXECOPT
doOpt = SHDocVw.OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER '<<< is
this is the one to suppress prompt?

Dim o As New Object()
Try
webBrowser.ExecWB(SHDocVw.OLECMDID.OLECMDID_SAVEAS, doOpt,
CType(strFileSpec, Object), o)
Catch
Throw (New Exception(Err.GetException().Message))
End Try

I did confirm that doOpt has the correct value of 2 but I am miffed why it
was ignored