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VB6, VBA Example ' The following example codes demonstrate encrypting email message with digital signature - S/MIME
' To get full sample projects, please download and install EASendMail on your machine.
' To run it correctly, please change SMTP server, user, password, sender, recipient value to yours
Code:
Const CRYPT_MACHINE_KEYSET = 32
Const CRYPT_USER_KEYSET = 4096
Const CERT_SYSTEM_STORE_CURRENT_USER = 65536
Const CERT_SYSTEM_STORE_LOCAL_MACHINE = 131072
Private Sub btnEncryptEmail_Click()
Dim oSmtp As New EASendMailObjLib.Mail
oSmtp.LicenseCode = "TryIt"
' Set your sender email address
oSmtp.FromAddr = "test@emailarchitect.net"
' Add recipient email address
oSmtp.AddRecipientEx "support@emailarchitect.net", 0
' Set email subject
oSmtp.Subject = "test encrypted email from VB 6.0 project"
' Set email body
oSmtp.BodyText = "this is a test encrypted email sent from VB 6.0 project"
' Your SMTP server address
oSmtp.ServerAddr = "smtp.emailarchitect.net"
' User and password for ESMTP authentication, if your server doesn't require
' User authentication, please remove the following codes.
oSmtp.UserName = "test@emailarchitect.net"
oSmtp.Password = "testpassword"
' If your smtp server requires SSL connection, please add this line
' oSmtp.SSL_init
' Add digital signature
If Not oSmtp.SignerCert.FindSubject("test@emailarchitect.net", _
CERT_SYSTEM_STORE_CURRENT_USER, "my") Then
MsgBox oSmtp.SignerCert.GetLastError()
Exit Sub
End If
If Not oSmtp.SignerCert.HasPrivateKey Then
MsgBox "Signer certificate has not private key, " & _
" this certificate can not be used to sign email!"
Exit Sub
End If
' Find the encrypting certificate for every recipients
Dim oEncryptCert As New EASendMailObjLib.Certificate
If Not oEncryptCert.FindSubject("support@emailarchitect.net", _
CERT_SYSTEM_STORE_CURRENT_USER, "AddressBook") Then
If Not oEncryptCert.FindSubject("support@emailarchitect.net", _
CERT_SYSTEM_STORE_CURRENT_USER, "my") Then
MsgBox oEncryptCert.GetLastError()
Exit Sub
End If
End If
' Add encrypting certificate
oSmtp.RecipientsCerts.Add oEncryptCert
MsgBox "start to send email ..."
If oSmtp.SendMail() = 0 Then
MsgBox "email was sent successfully!"
Else
MsgBox "failed to send email with the following error:" & oSmtp.GetLastErrDescription()
End If
End Sub
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