(VBScript) 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 fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

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

set imap = CreateObject("Chilkat.Imap")

' Connect to an IMAP server.
' Use TLS
imap.Ssl = 1
imap.Port = 993
success = imap.Connect("imap.example.com")
If (success = 0) Then
    outFile.WriteLine(imap.LastErrorText)
    WScript.Quit
End If

' Login
success = imap.Login("****","****")
If (success = 0) Then
    outFile.WriteLine(imap.LastErrorText)
    WScript.Quit
End If

' Select an IMAP mailbox
success = imap.SelectMailbox("Inbox")
If (success = 0) Then
    outFile.WriteLine(imap.LastErrorText)
    WScript.Quit
End If

' Get the message IDs of all the emails in the mailbox
' We can choose to fetch UIDs or sequence numbers.
fetchUids = 1
set messageSet = CreateObject("Chilkat.MessageSet")
success = imap.QueryMbx("ALL",fetchUids,messageSet)
If (success = 0) Then
    outFile.WriteLine(imap.LastErrorText)
    WScript.Quit
End If

numFound = messageSet.Count
If (numFound = 0) Then
    outFile.WriteLine("No messages found.")
    WScript.Quit
End If

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

i = 0
bUid = messageSet.HasUids
headerOnly = 1
set email = CreateObject("Chilkat.Email")

Do While i < upperBound

    success = imap.FetchEmail(headerOnly,messageSet.GetId(i),bUid,email)
    If (success = 0) Then
        outFile.WriteLine(imap.LastErrorText)
        WScript.Quit
    End If

    outFile.WriteLine(i & ": " & email.Subject)

    i = i + 1
Loop

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

outFile.Close