FileAttr Function

Returns the access mode or the file access number of a file that was opened with the Open statement. The file access number is dependent on the operating system (OSH = Operating System Handle).

Note Icon

If you use a 32-Bit operating system, you cannot use the FileAttr-Function to determine the file access number.

මේවාත් බලන්න: විකල්ප


FileAttr (FileNumber As Integer, Attribute As Integer)

Return value:



FileNumber: The number of the file that was opened with the Open statement.

Attribute: Integer expression that indicates the type of file information that you want to return. The following values are possible:

1: The FileAttr-Function indicates the access mode of the file.

2: The FileAttr-Function returns the file access number of the operating system.

If you specify a parameter attribute with a value of 1, the following return values apply:

1 - INPUT (file open for input)

2 - OUTPUT (file open for output)

4 - RANDOM (file open for random access)

8 - APPEND (file open for appending)

32 - BINARY (file open in binary mode).

Error codes:

5 Invalid procedure call

D'oh! You found a bug (text/sbasic/shared/00000003.xhp#err52 not found).


Sub ExampleFileAttr
    Dim iNumber As Integer
    Dim sLine As String
    Dim aFile As String
    aFile = "C:\Users\ThisUser\data.txt"
    iNumber = Freefile
    Open aFile For Output As #iNumber
    Print #iNumber, "This is a line of text"
    MsgBox FileAttr(#iNumber, 1), 0, "Access mode"
    MsgBox FileAttr(#iNumber, 2), 0, "File attribute"
    Close #iNumber
End Sub

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