VB.NET

Store One or More Flags on a Single Message

Demonstrates the Chilkat Imap.StoreFlags method, which sets or clears one or more flags on a single message identified by ID. The first argument is the message ID, the second (bUid) selects UID vs sequence number, the third is a space-separated list of flag names, and the fourth is the value (1 to set, 0 to clear). This example applies the Seen and Flagged flags to one message by UID.

Background: StoreFlags is the single-message counterpart to SetFlags and lets you change several flags at once by listing them space-separated (without leading backslashes). Because the ID can be either a UID or a sequence number, the bUid argument must match how you obtained it — a UID from a UID search, or a sequence number from a sequence-based operation. UIDs are the safer choice since they remain valid as the mailbox changes.

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Dim success As Boolean = False

'  Demonstrates the Imap.StoreFlags method, which sets or clears one or more flags on a single
'  message identified by ID.  The 1st argument is the message ID, the 2nd (bUid) selects UID
'  vs sequence number, the 3rd is a space-separated list of flag names, and the 4th is the
'  value (1 to set, 0 to clear).

Dim imap As New Chilkat.Imap

imap.Ssl = True
imap.Port = 993

success = imap.Connect("imap.example.com")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If

success = imap.Login("user@example.com","myPassword")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


success = imap.SelectMailbox("Inbox")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


'  Get the UIDs of all messages.
Dim msgSet As New Chilkat.MessageSet
success = imap.QueryMbx("ALL",True,msgSet)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


If (msgSet.Count > 0) Then
    '  Apply the Seen and Flagged flags to the first message.  bUid is True because the ID
    '  came from a UID search.
    Dim uid As UInt32 = msgSet.GetId(0)
    success = imap.StoreFlags(uid,True,"Seen Flagged",1)
    If (success = False) Then
        Debug.WriteLine(imap.LastErrorText)
        Exit Sub
    End If

    Debug.WriteLine("Updated flags on UID " & uid)
End If


success = imap.Disconnect()
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If