The answer to every OLE question is RTFM. How to use OLE automation in Visio 
Set AppVisio = CreateObject("Visio.InvisibleApp")

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You can then use the Application object's Visible property to control whether the instance is visible.

You can use the InvisibleApp object with only the CreateObject function. Attempts to use it with the GetObject function will fail. The InvisibleApp object is not available in versions of Visio earlier than Microsoft Visio 2000.

In reply to Re: Hiding .vsd file while reading the file. by Anonymous Monk
in thread Hiding .vsd file while reading the file. by skinamdar

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