VBA Function To Determine If An Excel File Name Is Valid

VBA Macro Validate Excel File Name

What This VBA Macro Code Does

I've written a few macros over the past few days that have required the user to submit a name for a newly saved Excel file. If you've tried saving files with certain special characters, you know that you can get rejected if you don't provide a name within the range of allowed characters. Below is a VBA function you can use to test if a given string is in compliance with a compatible file name for Excel.

Function ValidFileName(FileName As String) As Boolean
'PURPOSE: Determine If A Given Excel File Name Is Valid
'SOURCE: www.TheSpreadsheetGuru.com/the-code-vault

Dim wb As Workbook

'Create a Temporary XLS file
  On Error GoTo InvalidFileName
    Set wb = Workbooks.Add
    wb.SaveAs Environ("TEMP") & "\" & FileName & ".xls", xlExcel8
  On Error Resume Next

'Close Temporary Workbook file
  wb.Close (False)

'Delete Temporary File
  Kill Environ("TEMP") & "\" & FileName & ".xls"

'File Name is Valid!
  ValidFileName = True

Exit Function

  'Close Temporary Workbook file
    wb.Close (False)

  'File Name is Invalid
    ValidFileName = False

End Function

Let's Test It Out!

Below is a simple macro that should give you an idea of how to use the above validation function for a given filename.

Sub TestFunction()
'PURPOSE: Test the ValidFileName function

If ValidFileName("[My] Workbook") = True Then
  MsgBox "The file name provide is a valid name for an Excel file"
  MsgBox "The file name provide is NOT a valid name for an Excel file"
End If

End Sub

How Do I Modify This To Fit My Specific Needs?

Chances are this post did not give you the exact answer you were looking for. We all have different situations and it's impossible to account for every particular need one might have. That's why I want to share with you: My Guide to Getting the Solution to your Problems FAST! In this article, I explain the best strategies I have come up with over the years to getting quick answers to complex problems in Excel, PowerPoint, VBA, you name it

I highly recommend that you check this guide out before asking me or anyone else in the comments section to solve your specific problem. I can guarantee 9 times out of 10, one of my strategies will get you the answer(s) you are needing faster than it will take me to get back to you with a possible solution. I try my best to help everyone out, but sometimes I don't have time to fit everyone's questions in (there never seem to be quite enough hours in the day!).

I wish you the best of luck and I hope this tutorial gets you heading in the right direction!

~ Chris