C API (8.5.3) MMCreateConvControls no effect when converting CD to MIME

Setting MMCreateConvControls does not seem to have effect on the MIME message created. For instance, changing value in call to MMSetAttachEncoding from 1 (base64) to 2(quoted printable) does not change the resulting attachment encoding (remains base64)

if( error = MMCreateConvControls( &hCC ) )

{

	sprintf(szMessage, "\tConvertNotetoEML: MMCreateConvControls failed-> NOTEID = %d", NoteId);

	logMessage(szMessage);

	PrintAPIError (error);

	return FALSE;

}

MMSetMessageContentEncoding( hCC, 3 ); // multipart/alternative: text/plain & text/html (w/images & attachments)

MMSetAttachEncoding( hCC, 2 );         // Encode attachments - doesn't seem to have any affect on conversion

										/* 1 - base64 (default) */

										/* 2 - quoted-printable */

										/* 3 - uuencode */

										/* 4 - binhex 4.0 */