six demon bag

2013-08-27

Import other script files in VBScript

The VBScript language doesn't provide a feature for including other code files, so you can't easily build and import code libraries. However, the missing feature can be emulated using the ExecuteGlobal statement in a custom Import procedure.

'! Import the first occurrence of the given filename from the working directory
'! or any directory in the %PATH%.
'!
'! @param  filename   Name of the file to import.
'!
'! @see http://gazeek.com/coding/importing-vbs-files-in-your-vbscript-project/
Private Sub Import(ByVal filename)
  Dim fso, sh, code, dir

  ' Create my own objects, so the procedure is self-contained and can be called
  ' before anything else in the script.
  Set fso = CreateObject("Scripting.FileSystemObject")
  Set sh  = CreateObject("WScript.Shell")

  filename = Trim(sh.ExpandEnvironmentStrings(filename))
  If Not (Left(filename, 2) = "\\" Or Mid(filename, 2, 2) = ":\") Then
    ' filename is not absolute
    If Not fso.FileExists(fso.GetAbsolutePathName(filename)) Then
      ' file doesn't exist in the working directory => iterate over the
      ' directories in the %PATH% and take the first occurrence
      ' if no occurrence is found => use filename as-is, which will result
      ' in an error when trying to open the file
      For Each dir In Split(sh.ExpandEnvironmentStrings("%PATH%"), ";")
        If fso.FileExists(fso.BuildPath(dir, filename)) Then
          filename = fso.BuildPath(dir, filename)
          Exit For
        End If
      Next
    End If
    filename = fso.GetAbsolutePathName(filename)
  End If

  code = fso.OpenTextFile(filename).ReadAll

  ExecuteGlobal code

  Set fso = Nothing
  Set sh  = Nothing
End Sub

I found this on http://gazeek.com/coding/importing-vbs-files-in-your-vbscript-project/, but since the domain seems to be offline I'm documenting it here.

Posted 14:00 [permalink]

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