Code to detect whether PowerPoint is running on a Macintosh

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  ' **********************************************************************
   '
   ' FUNCTION:
   '    RunningOnMac() As Boolean
   '
   ' PURPOSE:
   '    Detects if you are running on a Macintosh computer.
   '
   ' ARGUMENTS:
   '    None
   '
   ' RETURNS:
   '    True - You are running on a Macintosh computer.
   '    False - You are not running on a Macintosh computer.
   '
   ' **********************************************************************
   Function RunningOnMac() As Boolean

      ' Get the Operating System string.
      Dim strOs As String
      strOs = Application.OperatingSystem

      ' Check if the string Mac is part of the Os string.
      If InStr(1, strOs, "Mac", vbBinaryCompare) > 0 Then
         RunningOnMac = True
      Else
         RunningOnMac = False
      End If

   End Function
				

The following example shows how to use the RunningOnMac function:

   Sub main()

      ' Test if you are on a Macintosh computer.
      If RunningOnMac Then

         ' Enter Macintosh-specific code here.
         MsgBox "Running on a Macintosh"

      Else

         ' Enter Windows-specific code here.
         MsgBox "Running on Windows"
       End If

   End Sub