(Visual Basic 6.0) Fetch 1st N Headers of Search Results

Calls Search to get a message set, then downloads the 1st N messages in the message set. There are two equivalent ways of doing it: (1) iterate from 0 to N-1 and download each message individually, or (2) create a new message set that contains the 1st N messages and pass it to FetchHeaders. Both are demonstrated here.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim success As Long
success = 0

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

Dim imap As New ChilkatImap

' Connect to an IMAP server.
' Use TLS
imap.Ssl = 1
imap.Port = 993
success = imap.Connect("imap.example.com")
If (success = 0) Then
    Debug.Print imap.LastErrorText
    Exit Sub
End If

' Login
success = imap.Login("****","****")
If (success = 0) Then
    Debug.Print imap.LastErrorText
    Exit Sub
End If

' Select an IMAP mailbox
success = imap.SelectMailbox("Inbox")
If (success = 0) Then
    Debug.Print imap.LastErrorText
    Exit Sub
End If

' Get the message IDs of all the emails in the mailbox
' We can choose to fetch UIDs or sequence numbers.
Dim fetchUids As Long
fetchUids = 1
Dim messageSet As New MessageSet
success = imap.QueryMbx("ALL",fetchUids,messageSet)
If (success = 0) Then
    Debug.Print imap.LastErrorText
    Exit Sub
End If

Dim numFound As Long
numFound = messageSet.Count
If (numFound = 0) Then
    Debug.Print "No messages found."
    Exit Sub
End If

' Get the 1st 10 messages in messageSet.
Dim upperBound As Long
upperBound = 10
If (numFound < upperBound) Then
    upperBound = numFound
End If

Dim i As Long
i = 0
Dim bUid As Long
bUid = messageSet.HasUids
Dim headerOnly As Long
headerOnly = 1
Dim email As New ChilkatEmail

Do While i < upperBound

    success = imap.FetchEmail(headerOnly,messageSet.GetId(i),bUid,email)
    If (success = 0) Then
        Debug.Print imap.LastErrorText
        Exit Sub
    End If

    Debug.Print i & ": " & email.Subject

    i = i + 1
Loop

' Disconnect from the IMAP server.
success = imap.Disconnect()