test if text file is open

I use a text file in my program to create a logfile as the program runs to help me debug it. However, sometimes it is left open and then when it tries to reopen it crashes. Here is the code that I use to open it:

[VBA]Dim logFile As String

logFile = "H:\@Temp\Daniel B\Log Files\" & Environ("UserName") & "_LogFile.txt"

FileNumber = FreeFile ' Get unused fileno
'Create file name.
Open logFile For Append As #FileNumber[/VBA]

How can I test to see if it is open first? I know how to do it with a word file and an excel file but I tried to figure that out but it is completely different.

One possiblity would be to check if it errors and report it. Maybe a function like

Code:

---

Private Function IsFileOK(FullPath As String) As Boolean
Dim f As Integer
IsFileOK = True
On Error GoTo FileProblem
f = FreeFile
Open FullPath For Append As #f
Close #f
Exit Function
FileProblem:
IsFileOK = False
End Function

---

used like

Code:

---

If IsFileOK(logfile) Then
    filenumber = FreeFile
    Open logfile For Append As #filenumber
    ' ...
    Close #filenumber
Else
MsgBox ("Can not access file")
End If

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