int EvaluateMsgHdr(const char *HeaderName, long HdrNLen, message_summary *Msg, StrBuf *HdrLine, StrBuf *FoundCharset);
int EvaluateMsgHdrEnum(eMessageField f, message_summary *Msg, StrBuf *HdrLine, StrBuf *FoundCharset);
int EvaluateMsgHdr(const char *HeaderName, long HdrNLen, message_summary *Msg, StrBuf *HdrLine, StrBuf *FoundCharset);
int EvaluateMsgHdrEnum(eMessageField f, message_summary *Msg, StrBuf *HdrLine, StrBuf *FoundCharset);