C# Signature:

    [DllImport("avifil32.dll")]
     public static extern int AVIFileInfo(IntPtr pfile, ref AVIFILEINFO pfi, int lSize);

C# AVIFILEINFO structure:

VB Signature:

  <DllImport("avifil32.dll")> _
    Public Shared Function AVIFileInfo(ByVal pfile As IntPtr,
                       ByRef pfi As AVIFILEINFO,
                       ByVal lSize As Integer) As Integer
    End Function

VB AVIFILEINFO structure:

    Public Structure AVIFILEINFO
    Public dwMaxBytesPerSecond As Int32
    Public dwFlags As Int32
    Public dwCaps As Int32
    Public dwStreams As Int32
    Public dwSuggestedBufferSize As Int32
    Public dwWidth As Int32
    Public dwHeight As Int32
    Public dwScale As Int32
    Public dwRate As Int32
    Public dwLength As Int32
    Public dwEditCount As Int32
    <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=64)> Public szFileType As String
    end structure

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Notes:

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