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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Check-that-file-exists/Visual-Basic/check-that-file-exists.vb Normal file
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'declarations:
Public Declare Function GetFileAttributes Lib "kernel32" _
Alias "GetFileAttributesA" (ByVal lpFileName As String) As Long
Public Const INVALID_FILE_ATTRIBUTES As Long = -1
Public Const ERROR_SHARING_VIOLATION As Long = 32&
'implementation:
Public Function FileExists(ByVal Filename As String) As Boolean
Dim l As Long
l = GetFileAttributes(Filename)
If l <> INVALID_FILE_ATTRIBUTES Then
FileExists = ((l And vbDirectory) = 0)
ElseIf Err.LastDllError = ERROR_SHARING_VIOLATION Then
FileExists = True
End If
End Function