C# Signature:

[DllImport("avifil32.dll", SetLastError=true)]
public static extern int AVIFileOpenW(ref IntPtr ppfile, [MarshalAs(UnmanagedType.LPWStr)]string szFile, int uMode, IntPtr pclsidHandler);
[DllImport("avifil32.dll")]
static extern int AVIFileOpen(out IntPtr ppfile, string szFile, uint mode, int pclsidHandler);

VB Signature:

Declare Shared Function AVIFileOpenW Lib "avifil32.dll" (TODO)
Private Declare Function AVIFileOpen Lib "avifil32" Alias "AVIFileOpenA" (ByRef ppfile As Integer, ByVal szFile As String, ByVal mode As Integer, ByVal pclsidHandler As Integer) As Integer

User-Defined Types:

None.

Notes:

Test

Tips & Tricks:

For C#, use AviFileOpen together with CharSet = CharSet.Auto.

Sample Code:

See http://www.adp-gmbh.ch/csharp/avi/write_avi.html

Alternative Managed API:

Do you know one? Please contribute it!

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

'View Avinfo for Structure

'if a valid file, return the AVIFILEINFO structure

public Function Avi_Lenght(ByVal sAVIFile as String) as int32

Dim hFile As Long

Dim AFI As AVIFILEINFO

'initialize the AVIFile library

AVIFileInit()

If AVIFileOpen(hFile, sAVIFile, OF_SHARE_DENY_WRITE, 0&) = 0 Then

        Dim aviFileInfo_lsize = Marshal.SizeOf(GetType(AVIFILEINFO))

        AVIFileInfo(Instance, AFI , aviFileInfo_lsize)

Else

'Your Error handling Here

end If

AVIFileExit()

Return System.Math.Round(AFI .dwLength / ((AFI .dwRate / AFI .dwScale)), 3)

End Function

A full working version is located here http://ess-image.com/Graphic/Video/AviInfo.aspx Reading AVI information In VB .net

This sample as well as other image procssing source code provided by http://Ess-image.com">Ess-image.com

microsoft.public.dotnet.framework.interop has a working example code to call AVIInit, AVIExit, and AVIFileInfo.

http://groups.google.com/group/microsoft.public.dotnet.framework.interop/browse_thread/thread/9c06b6ed292a8ea8/012f9e44dad14284?lnk=gst&q=avifileinfo&rnum=1#012f9e44dad14284

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