DataFlex Requires Chilkat v11.0.0+

Mark IMAP Email as Read/Unread (Seen/Unseen)

Demonstrates how to mark emails as read or unread. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoImap
    Integer iNumMsgs
    Variant vEmail
    Handle hoEmail
    Integer i
    Boolean iBIsUid
    String sTemp1

    Move False To iSuccess

    //  This example assumes the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    Get Create (RefClass(cComChilkatImap)) To hoImap
    If (Not(IsComObjectCreated(hoImap))) Begin
        Send CreateComObject of hoImap
    End

    //  Connect to an IMAP server.
    //  Use TLS
    Set ComSsl Of hoImap To True
    Set ComPort Of hoImap To 993
    Get ComConnect Of hoImap "imap.example.com" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Login
    Get ComLogin Of hoImap "myLogin" "myPassword" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Select an IMAP mailbox
    Get ComSelectMailbox Of hoImap "Inbox" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Set PeekMode so that downloaded messages are not
    //  automatically marked as seen.
    Set ComPeekMode Of hoImap To True

    //  The NumMessages property contains the number of messages 
    //  in the currently selected mailbox.
    Get ComNumMessages Of hoImap To iNumMsgs
    If (iNumMsgs = 0) Begin
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End

    For i From 1 To iNumMsgs
        //  Download each email by sequence number (not UID)
        Get pvComObject of hoEmail to vEmail
        Get ComFetchEmail Of hoImap False i False vEmail To iSuccess
        If (iSuccess = False) Begin
            Get ComLastErrorText Of hoImap To sTemp1
            Showln sTemp1
            Procedure_Return
        End

        //  If desired, mark the email as SEEN.  There are two
        //  ways to do it:

        //  1) Set the flag directly by using the sequence number
        //  Indicate that we are passing a sequence number and
        //  not a UID:
        Move False To iBIsUid
        //  Set the SEEN flag = 1 to mark the email as SEEN,
        //  or set it to 0 to mark it as not-seen.
        Get ComSetFlag Of hoImap i iBIsUid "SEEN" 1 To iSuccess
        If (iSuccess = False) Begin
            Get ComLastErrorText Of hoImap To sTemp1
            Showln sTemp1
            Procedure_Return
        End

        //  2) Alternatively, we can use the email object.
        //  When an email is downloaded from the IMAP server
        //  Chilkat will add a "ckx-imap-uid" header to the email.
        //  This makes it possible to know the UID associated with
        //  the email.  (This is not the sequence number, which may change
        //  from session to session, but the UID which does not change.
        //  The SetMailFlag method is identical to SetFlag, except
        //  it gets the UID from the ckx-imap-uid header.
        //  For example:
        Get pvComObject of hoEmail to vEmail
        Get ComSetMailFlag Of hoImap vEmail "SEEN" 1 To iSuccess
        If (iSuccess = False) Begin
            Get ComLastErrorText Of hoImap To sTemp1
            Showln sTemp1
            Procedure_Return
        End

    Loop

    //  Disconnect from the IMAP server.
    Get ComDisconnect Of hoImap To iSuccess


End_Procedure