XL2000: For Each Loop to Determine If an Excel Workbook Is Open

Microsoft Excel does not include a Microsoft Visual Basic for Applications function to determine whether a workbook is already open. The following sample user-defined function loops through all of the opened workbooks in memory to determine whether a specific workbook is already open in the current instance of Excel.

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For more information about the support options that are available and about how to contact Microsoft, visit the following Microsoft Web site:http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS To create the user-defined function IsOpen, follow these steps:

1. Start Microsoft Excel.
2. Press ALT+F11 to start the Visual Basic editor.
3. On the Insert menu, click Module.
4. In the module sheet, type the following code:

   Function IsOpen(FileName As String) As Boolean
       Dim wb As Workbook
       For Each wb In Application.Workbooks
           If UCase(wb.Name) = UCase(FileName) Then
               IsOpen = True
               Exit Function
           End If
       Next wb
       IsOpen = False
   End Function
   						

The following sample Visual Basic sub procedure calls the user-defined IsOpen function. The IsOpen function returns a True if Book1.xls is already open in the current instance of Microsoft Excel; otherwise, IsOpen returns False.

You can use the following code to test for any Excel Workbook by replacing the workbook name "Book1.xls" with the workbook you want.

To create a sub procedure to test for an open Excel workbook, follow these steps:

1. Start Microsoft Excel.
2. Press ALT+F11 to start the Visual Basic editor.
3. On the Insert menu, click Module.
4. In the module sheet, type the following code:

   Sub Test()
       If IsOpen("Book1.xls") Then
          MsgBox "The file is open."
       Else
          MsgBox "The file is not open."
       End If
   End Sub