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Get an Alternative Body into a BinData

Demonstrates the Chilkat Email.GetAlternativeBodyBd method, which copies the contents of the Nth alternative body into a BinData object. The first alternative body is at index 0, and it should only be called when NumAlternatives is greater than 0. This example builds a message with plain-text and HTML alternatives and copies the first into a BinData.

Background: This is the binary counterpart to GetAlternativeBody (which returns text). Reading an alternative into a BinData preserves the exact bytes — important when a body part uses a binary or unusual transfer encoding, or when you intend to hash it or write it out verbatim rather than decode it to a string.

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Local $bSuccess = False

;  Demonstrates the GetAlternativeBodyBd method, which copies the contents of the Nth
;  alternative body into a BinData object.  The first alternative body is at index 0; call
;  only when NumAlternatives is greater than 0.

$oEmail = ObjCreate("Chilkat.Email")
$oEmail.Subject = "GetAlternativeBodyBd example"

$oEmail.SetTextBody "This is the plain-text alternative.","text/plain"
$oEmail.AddHtmlAlternativeBody("<html><body>This is the HTML alternative.</body></html>")

;  Copy the first alternative body (index 0) into a BinData object.
$oBd = ObjCreate("Chilkat.BinData")

$bSuccess = $oEmail.GetAlternativeBodyBd(0,$oBd)
If ($bSuccess = False) Then
    ConsoleWrite($oEmail.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Alternative 0 size (bytes) = " & $oBd.NumBytes & @CRLF)