Need help with Unregistering a dll

[imani]

The command to unregister the following dll is this

regsvr32 /u /s "C:\Program Files\HashTab Shell Extension\hashtab.dll"

But the $dll is not enclosing in quotations. Does anybody has the solution

$dll = String(@ProgramFilesDir & "\HashTab Shell Extension\HashTab.dll")
MsgBox(0,"","regsvr32.exe /u /s " & $dll)
Run('regsvr32 /u /s ' & '$dll')

[Jos]

Run('regsvr32 /u /s "' & $dll & '"')

[imani]

Run('regsvr32 /u /s "' & $dll & '"')

Thanks Jos