DataFlex

Test if an Email Header Matches a Pattern

Demonstrates the Chilkat Email.HasHeaderMatching method, which returns true when the email contains a header field named by the first argument whose value matches the wildcard pattern in the second argument. The third argument selects case-sensitive matching. This example checks whether the Subject contains the word "invoice".

Background: The value pattern supports wildcards — * matches any run of characters — so *invoice* matches any subject containing "invoice" anywhere. This is a compact way to classify or filter messages by header content, for example routing billing mail or flagging automated notices, without manually fetching the header value and testing it yourself.

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Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoEmail
    Boolean iMatch

    //  Demonstrates the HasHeaderMatching method, which returns true when the email contains a
    //  header field named by the first argument whose value matches the wildcard pattern in the second argument.  The third argument selects
    //  case-sensitive matching.

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End
    Set ComSubject Of hoEmail To "Monthly invoice #4432"
    Set ComFrom Of hoEmail To "billing@example.com"

    //  Check whether the Subject header value matches a wildcard pattern (case-insensitive).
    Get ComHasHeaderMatching Of hoEmail "Subject" "*invoice*" False To iMatch

    If (iMatch = True) Begin
        Showln "The Subject header contains 'invoice'."
    End
    Else Begin
        Showln "The Subject header does not contain 'invoice'."
    End



End_Procedure