How do you use Shell with filenames that contain spaces

[miyatal]

I am having trouble launching applications using the "Shell" command in Access 97 when the file name contains spaces, it works great when there are no spaces. I tried putting the file name in quotes, brackets, parenthesis, single quotes, etc.- but no luck

e.g.
Shell pathname:=strDirectory & " " & strFile, windowstyle:=1

where strDirectory is the application for e.g. c\office\winword.exe
and
strFile is a file name with spaces e.g. "File With Spaces.doc"