PlayAVIVideoOFF – Play only the audio track of an AVI file

Private Declare Function mciSendString Lib "winmm" Alias "mciSendStringA" _    (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, _    ByVal uReturnLength As Long, ByVal hwndCallback As Long) As LongPrivate Declare Function mciGetErrorString Lib "winmm" Alias _    "mciGetErrorStringA" (ByVal dwError As Long, ByVal lpstrBuffer As String, _    ByVal uLength As Long) As LongPrivate Declare Function GetShortPathName Lib "kernel32" Alias _    "GetShortPathNameA" (ByVal lpszLongPath As String, _    ByVal lpszShortPath As String, ByVal cchBuffer As Long) As Long' Play the audio track of an AVI file.' FileName is a string containing the full path of the file.Sub PlayAVIVideoOFF(FileName As String)    Dim RetVal As Long    Dim CommandString As String    Dim ShortFileName As String * 260    Dim deviceIsOpen As Boolean    ' Retrieve short file name format    RetVal = GetShortPathName(FileName, ShortFileName, Len(ShortFileName))    FileName = Left$(ShortFileName, RetVal)        ' Open the device    CommandString = "Open " & FileName & " type avivideo alias AVIFile"    RetVal = mciSendString(CommandString, vbNullString, 0, 0&)    If RetVal Then GoTo error        ' remember that the device is now open    deviceIsOpen = True        ' Set video OFF    CommandString = "Set AVIFile video off"    RetVal = mciSendString(CommandString, vbNullString, 0, 0&)    If RetVal Then GoTo error        ' Play the file    CommandString = "Play AVIFile wait"    RetVal = mciSendString(CommandString, vbNullString, 0, 0&)    If RetVal Then GoTo error        ' Close the device    CommandString = "Close AVIFile"    RetVal = mciSendString(CommandString, vbNullString, 0, 0&)    If RetVal Then GoTo error    Exit Sub    error:    ' An error occurred.    ' Get the error description    Dim ErrorString As String    ErrorString = Space$(256)    mciGetErrorString RetVal, ErrorString, Len(ErrorString)    ErrorString = Left$(ErrorString, InStr(ErrorString, vbNullChar) - 1)    ' close the device if necessary    If deviceIsOpen Then        CommandString = "Close AVIFile"        mciSendString CommandString, vbNullString, 0, 0&    End If    ' raise a custom error, with the proper description    Err.Raise 999, , ErrorStringEnd Function