Call RegComponent(sExePath & "\Report.dll", " /u /s")
Call RegComponent(sExePath & "\Report.dll", " /s")
Call RegComponent(sExePath & "\Mscal.ocx", " /u /s") ''unregister
Call RegComponent(sExePath & "\Mscal.ocx", " /s") ''register, "/s"' silent switch mode

Public Sub RegComponent(ByVal ComName As String, ByVal sRegister As String)
    Shell ("Regsvr32 " & ComName & sRegister)
End Sub

' You can manually register a component by going to START | RUN and typing in "Regsvr32.exe" and the name of component -- in quotes, full path, as string.
For example:

Regsvr32.exe "C:\Windows\System32\mscomctl.ocx"