Check if Certificate Expired

How to check to see if a digital certificate is expired.

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

set cert = CreateObject("Chilkat.Cert")

'  The LoadByCommonName method searches the registry-based
'  Windows Current User Certificate Store and Local Machine Certificate
'  Store for a certificate whose common name (CN) matches
'  the argument:

success = cert.LoadByCommonName("Chilkat Software, Inc.")
If (success = 0) Then
    MsgBox "Failed to find certificate!"
Else

    '  Display the certificate's distinguished name:
    outFile.WriteLine(cert.SubjectDN)

    isExpired = cert.Expired
    If (isExpired = 1) Then
        outFile.WriteLine("Certificate is expired.")
    Else
        outFile.WriteLine("Certificate is NOT expired.")
    End If

End If

'  Alternatively, load a Certificate from a .cer file.
'  (Certs may also be loaded from other types of files, such as PEM, DER, PFX, etc.)
success = cert.LoadFromFile("myCert.cer")
If (success = 0) Then
    MsgBox "Failed to load certificate!"
Else

    '  Display the certificate's distinguished name:
    outFile.WriteLine(cert.SubjectDN)

    isExpired = cert.Expired
    If (isExpired = 1) Then
        outFile.WriteLine("Certificate is expired.")
    Else
        outFile.WriteLine("Certificate is NOT expired.")
    End If

End If

'  The Chilkat Certificate, Certificate Store, Private Key,
'  Public Key, and Key Container classes / objects are freeware.

'  They are used by and included with the Chilkat Email,
'  Crypt, S/MIME, and other commercial Chilkat components.

outFile.Close