Visual Basic 6.0

Check if a MIME Entity is multipart/alternative

Demonstrates the Chilkat Mime.IsMultipartAlternative method, which returns whether the Content-Type is exactly multipart/alternative. It takes no arguments.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: Recognizing multipart/alternative matters because its children are the same content in different formats — you display one (usually the last renderable), not all of them. That is the opposite of multipart/mixed, where every child is shown.

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Visual Basic 6.0

Dim success As Long
success = 0

'  Demonstrates the Mime.IsMultipartAlternative method, which returns whether the Content-Type is multipart/alternative.  It takes no arguments.

Dim mime As New ChilkatMime
success = mime.LoadMimeFile("qa_data/multipart_message.eml")
If (success = 0) Then
    Debug.Print mime.LastErrorText
    Exit Sub
End If

If (mime.IsMultipartAlternative()) Then
    Debug.Print "This is a multipart/alternative entity."
Else
    Debug.Print "This is not multipart/alternative."
End If