PowerShell
Create Apple Watch HTML (text/watch-html) Email

Demonstrates how to create an Apple Watch text/watch-html email.
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PowerShell
Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

# This example will produce an email such as:

# 	MIME-Version: 1.0
# 	Date: Fri, 02 Jun 2017 09:17:06 -0500
# 	Message-ID: <E6F1F17104442EA09740322D3E2E78806C87FB80@CHILKAT13>
# 	X-Priority: 3 (Normal)
# 	Subject: Apple Watch Example
# 	From: from@example.org
# 	To: to@example.org
# 	Content-Type: multipart/alternative; boundary="------------080904030200000307060803"
# 
# 	--------------080904030200000307060803
# 	Content-Type: text/plain; charset=utf-8
# 	Content-Transfer-Encoding: quoted-printable
# 	Content-Disposition: inline
# 
# 	This is the plain text part.
# 	--------------080904030200000307060803
# 	Content-Type: text/watch-html; charset=utf-8
# 	Content-Disposition: inline
# 	Content-Transfer-Encoding: quoted-printable
# 
# 	<b>This is the Watch HTML part</b>
# 	--------------080904030200000307060803
# 	Content-Type: text/html; charset=utf-8
# 	Content-Disposition: inline
# 	Content-Transfer-Encoding: quoted-printable
# 
# 	<p>This is the standard HTML part</p>
# 	--------------080904030200000307060803--

# Create a new email instance to get the default auto-created fields.
$email = New-Object Chilkat.Email
$email.Body = "This is the plain text part."
$email.Subject = "Apple Watch Example"
$email.From = "from@example.org"
$email.AddTo("","to@example.org")

$($email.GetMime())
$("--")

# This is the MIME so far:
# (Chilkat automatically removes CKX-* headers when sending email.)

# 	MIME-Version: 1.0
# 	Date: Fri, 02 Jun 2017 09:17:06 -0500
# 	Message-ID: <E6F1F17104442EA09740322D3E2E78806C87FB80@CHILKAT13>
# 	Content-Type: text/plain; format=flowed
# 	Content-Transfer-Encoding: 7bit
# 	X-Priority: 3 (Normal)
# 	Subject: Apple Watch Example
# 	From: from@example.org
# 	To: to@example.org
# 
# 	This is the plain text part.

# We'll use the Chilkat MIME object to build it.
# The MIME API provides more flexibility..
$mime = New-Object Chilkat.Mime
$mime.LoadMime($email.GetMime())

# Convert this MIME to multipart/alternative.
$mime.ConvertToMultipartAlt()

$($mime.GetMime())
$("--")

# We now have this MIME:

# 	MIME-Version: 1.0
# 	Date: Fri, 02 Jun 2017 09:17:06 -0500
# 	Message-ID: <E6F1F17104442EA09740322D3E2E78806C87FB80@CHILKAT13>
# 	X-Priority: 3 (Normal)
# 	Subject: Apple Watch Example
# 	From: from@example.org
# 	To: to@example.org
# 	Content-Type: multipart/alternative; boundary="------------080904030200000307060803"
# 
# 	--------------080904030200000307060803
# 	Content-Type: text/plain; format=flowed
# 	Content-Transfer-Encoding: 7bit
# 
# 	This is the plain text part.
# 	--------------080904030200000307060803--

# If we desire a particular charset, encoding, or disposition..

$partPlainText = New-Object Chilkat.Mime
$success = $mime.PartAt(0,$partPlainText)
if ($success -eq $false) {
    $($mime.LastErrorText)
    exit
}

$partPlainText.Charset = "utf-8"
$partPlainText.Disposition = "inline"
$partPlainText.Encoding = "quoted-printable"

# Create the text/watch-html MIME part and add it.
$partWatchHtml = New-Object Chilkat.Mime
$partWatchHtml.ContentType = "text/watch-html"
$partWatchHtml.Charset = "utf-8"
$partWatchHtml.Disposition = "inline"
$partWatchHtml.Encoding = "quoted-printable"
$partWatchHtml.SetBody("<b>This is the Watch HTML part</b>")
$mime.AppendPart($partWatchHtml)

$($mime.GetMime())
$("--")

# We now have this MIME:

# 	MIME-Version: 1.0
# 	Date: Fri, 02 Jun 2017 09:17:06 -0500
# 	Message-ID: <E6F1F17104442EA09740322D3E2E78806C87FB80@CHILKAT13>
# 	X-Priority: 3 (Normal)
# 	Subject: Apple Watch Example
# 	From: from@example.org
# 	To: to@example.org
# 	Content-Type: multipart/alternative; boundary="------------080904030200000307060803"
# 
# 	--------------080904030200000307060803
# 	Content-Type: text/plain; charset=utf-8
# 	Content-Transfer-Encoding: quoted-printable
# 	Content-Disposition: inline
# 
# 	This is the plain text part.
# 	--------------080904030200000307060803
# 	Content-Type: text/watch-html; charset=utf-8
# 	Content-Disposition: inline
# 	Content-Transfer-Encoding: quoted-printable
# 
# 	<b>This is the Watch HTML part</b>
# 	--------------080904030200000307060803--

# Create the text/html MIME part and add it.
$partHtml = New-Object Chilkat.Mime
$partHtml.ContentType = "text/html"
$partHtml.Charset = "utf-8"
$partHtml.Disposition = "inline"
$partHtml.Encoding = "quoted-printable"
$partHtml.SetBody("<p>This is the standard HTML part</p>")
$mime.AppendPart($partHtml)

$($mime.GetMime())
$("--")

# We now have this MIME:

# 	MIME-Version: 1.0
# 	Date: Fri, 02 Jun 2017 09:17:06 -0500
# 	Message-ID: <E6F1F17104442EA09740322D3E2E78806C87FB80@CHILKAT13>
# 	X-Priority: 3 (Normal)
# 	Subject: Apple Watch Example
# 	From: from@example.org
# 	To: to@example.org
# 	Content-Type: multipart/alternative; boundary="------------080904030200000307060803"
# 
# 	--------------080904030200000307060803
# 	Content-Type: text/plain; charset=utf-8
# 	Content-Transfer-Encoding: quoted-printable
# 	Content-Disposition: inline
# 
# 	This is the plain text part.
# 	--------------080904030200000307060803
# 	Content-Type: text/watch-html; charset=utf-8
# 	Content-Disposition: inline
# 	Content-Transfer-Encoding: quoted-printable
# 
# 	<b>This is the Watch HTML part</b>
# 	--------------080904030200000307060803
# 	Content-Type: text/html; charset=utf-8
# 	Content-Disposition: inline
# 	Content-Transfer-Encoding: quoted-printable
# 
# 	<p>This is the standard HTML part</p>
# 	--------------080904030200000307060803--

# Load the email object with this MIME, and we're good to go..
$email.SetFromMimeText($mime.GetMime())
$($email.GetMime())