In previous section, I introduced how to retrieve email from Hotmail/MSN Live account. In this section, I will introduce how to retrieve email with event handler in VB 6.0.
After Connect method, GetMail method or other methods are invoked, if you want to know the progress of the email receiving, you should use Event Handler. The following sample codes demonstrate how to use Event Handler to monitor the progress of email receiving.
Remarks: All of examples in this section are based on first section: A simple VB 6.0 project. To compile and run the following example codes successfully, please click here to learn how to create the test project and add reference to your project.
The following example codes demonstrate how to use EAGetMail POP3 component to retrieve
email with event handler. In order to run it correctly, please change
file name values.
To get the full sample projects, please refer to Samples section.
Option Explicit Private WithEvents oClient As EAGetMailObjLib.MailClient Const MailServerPop3 = 0 Const MailServerImap4 = 1 Const MailServerEWS = 2 Const MailServerDAV = 3 ' Catching the following events is not necessary, ' just make the application more user friendly. ' If you use the object in asp.net/windows service or non-gui application, ' You need not to catch the following events. ' To learn more detail, please refer to the code in EAGetMail EventHandler Private Sub oClient_OnAuthorized(ByVal oSender As Object, Cancel As Boolean) Debug.Print "Authorized" End Sub Private Sub oClient_OnConnected(ByVal oSender As Object, Cancel As Boolean) Debug.Print "Connected" End Sub Private Sub oClient_OnIdle(ByVal oSender As Object, Cancel As Boolean) DoEvents End Sub Private Sub oClient_OnQuit(ByVal oSender As Object, Cancel As Boolean) Debug.Print "Quit" End Sub Private Sub oClient_OnReceivingDataStream(ByVal oSender As Object, _ ByVal oInfo As Object, ByVal Received As Long, ByVal Total As Long, Cancel As Boolean) Dim info As EAGetMailObjLib.MailInfo Set info = oInfo Debug.Print "Receiving " & info.Index & ", " & Received & "/" & Total & "..." End Sub Private Sub oClient_OnSecuring(ByVal oSender As Object, Cancel As Boolean) Debug.Print "Securing ..." End Sub Private Sub Command1_Click() Dim curpath As String Dim mailbox As String Dim oTools As New EAGetMailObjLib.Tools ' Create a folder named "inbox" under current directory ' to save the email retrieved. curpath = App.Path mailbox = curpath & "\inbox" oTools.CreateFolder mailbox Dim oServer As New EAGetMailObjLib.MailServer oServer.Server = "pop3.emailarchitect.net" oServer.User = "email@example.com" oServer.Password = "testpassword" oServer.Protocol = MailServerPop3 ' Enable SSL/TLS connection, most modern email servers require SSL/TLS by default oServer.SSLConnection = True oServer.Port = 995 ' If your POP3 doesn't deploy SSL connection ' Please use ' oServer.SSLConnection = False ' oServer.Port = 110 On Error GoTo ErrorHandle: If oClient Is Nothing Then Set oClient = New EAGetMailObjLib.MailClient oClient.LicenseCode = "TryIt" End If oClient.Connect oServer Dim infos As EAGetMailObjLib.MailInfoCollection Set infos = oClient.GetMailInfoList() MsgBox infos.Count & " emails" Dim i As Long For i = 0 To infos.Count - 1 Dim info As EAGetMailObjLib.MailInfo Set info = infos.Item(i) MsgBox "Index: " & info.Index & "; Size: " & info.Size & _ "; UIDL: " & info.UIDL ' Receive email from POP3 server Dim oMail As EAGetMailObjLib.Mail Set oMail = oClient.GetMail(info) MsgBox "From: " & oMail.From.Address & _ vbCrLf & "Subject: " & oMail.Subject Dim fileName As String ' Generate a random file name by current local datetime, ' You can use your method to generate the filename if you do not like it fileName = mailbox & "\" & oTools.GenFileName(i) & ".eml" ' Save email to local disk oMail.SaveAs fileName, True ' Mark email as deleted from POP3 server. oClient.Delete info Next ' Quit and expunge emails marked as deleted from POP3 server. oClient.Quit Exit Sub ErrorHandle: MsgBox Err.Description End Sub
At next section I will introduce how to use UIDL function to mark the email has been downloaded.
If you have any comments or questions about above example codes, please click here to add your comments.