Follow hyperlink and read only

Hi,

I'm using this simple code to open any file from Excel (mostly Excel and Word):

Sub OpenWord()
    ActiveWorkbook.FollowHyperlink "C:\Test.docx", NewWindow:=True
    ActiveWindow.WindowState = xlMaximized
End Sub

How do I set ReadOnly? The idear is not to make changes to the opened files.

Kind regards

Peter