Create a Multipart-Mixed MIME Message

Creates a multipart-mixed MIME message with the 1st part containing plain-text, and the 2nd part containing a GIF image.

Download Chilkat MIME ActiveX

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

set mime = CreateObject("Chilkat.Mime")

success = mime.UnlockComponent("Anything for 30-day trial.")
If (success = 0) Then
    outFile.WriteLine(mime.LastErrorText)
    WScript.Quit
End If

'  Initialize a multipart-mixed MIME message:
mime.NewMultipartMixed 

'  Each sub-part will be prepared, then added to the
'  top-level multipart/mixed MIME object, and then written
'  to a file.

'  First the plain-text sub-part
'  Add a few header fields:
set textPart = CreateObject("Chilkat.Mime")
textPart.AddHeaderField "Description","this is a test"
textPart.AddHeaderField "MyId","123"
textPart.SetBodyFromPlainText "This is the plain-text body"

'  Now for a GIF image:
set imagePart = CreateObject("Chilkat.Mime")
success = imagePart.SetBodyFromFile("starfish.gif")
If (success = 0) Then
    outFile.WriteLine(imagePart.LastErrorText)
    WScript.Quit
End If

'  Append each sub-part to the top-level MIME object:
mime.AppendPart textPart
mime.AppendPart imagePart

'  Write the full multipart-mixed MIME to a file.
success = mime.SaveMime("out.mim")
If (success = 0) Then
    outFile.WriteLine(mime.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(mime.GetMime())

'  The MIME should look something like this:
'  (See more comments following this sample output...)

'  
Content-Type: multipart/mixed;
 boundary="------------080503030004040303020208"

This is a multi-part message in MIME format.

--------------080503030004040303020208
Description: this is a test
MyId: 123
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

This is the plain-text body
--------------080503030004040303020208
Content-Disposition: attachment; filename="starfish.gif"
Content-Transfer-Encoding: base64
Content-Type: image/gif; name="starfish.gif"

R0lGODlhIAAgAPcAAP///+/v7/f39+/n5/fv7//39/fn597OzufW1tbGxs69vffe3u/W1salpZQQ
EIQYEJwQCJQYCJwYCM6clL2Ee5wpGIwhEK0YANatpdalnHMYCKUhCJQYAKUYAM6Ec5QhCJwhCPfW
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ugSTCRA/ILFDCjTckUkrpYiCAEluYCMLJCsoMQUM9gjQRSSL7CLJJjmQxMw3kQChxA78IFULHIK0
MgonXyR5UAHWVBKIEmEcUJAIYxgSSSF94AZRPrgsQgUF0RmUgWpy/LFmRYdMkACAANwrWA8cbAhi
RZ8cjRWro0QEEsQVGTiKkLAM5QNGFWrAQFNLBIzABQPLRktQQAA7

--------------080503030004040303020208--

'  To explicitly set the boundary, set the Boundary property, like this:
mime.Boundary = "SOME_UNIQUE_BOUNDARY_STRING"

'  To eliminate the "This is a multi-part message in MIME format."
'  from the output, set the UseMmDescription property = 0
mime.UseMmDescription = 0

outFile.WriteLine(mime.GetMime())

'  The MIME now looks like this:
'  
Content-Type: multipart/mixed;
 boundary="SOME_UNIQUE_BOUNDARY_STRING"

--SOME_UNIQUE_BOUNDARY_STRING
Description: this is a test
MyId: 123
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

This is the plain-text body
--SOME_UNIQUE_BOUNDARY_STRING
Content-Disposition: attachment; filename="starfish.gif"
Content-Transfer-Encoding: base64
Content-Type: image/gif; name="starfish.gif"

R0lGODlhIAAgAPcAAP///+/v7/f39+/n5/fv7//39/fn597OzufW1tbGxs69vffe3u/W1salpZQQ
EIQYEJwQCJQYCJwYCM6clL2Ee5wpGIwhEK0YANatpdalnHMYCKUhCJQYAKUYAM6Ec5QhCJwhCPfW
zu/Oxta1rb17a6UhAK0hAPe9rb2Ec7V7a71rUpwpCL0xCJwhAOfOxta9tcatpdallM6cjMaUhK1C
IZwxELU5EK0xCLUxCN61pcacjK1rUrVaOaVKKZxCIZwxCKUxCL05CLUxAM6llO+1nMZzUr1rSrVS
KaVCGK1CGLVCEJQxCK05CLU5CIwpAKUxAK0xAM69tffWxrVrSrVaMbVKGMZKEL1CCLU5AP/v597O
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--SOME_UNIQUE_BOUNDARY_STRING--

outFile.Close