/*++

   Copyright    (c)    1996    Microsoft Corporation

   Module  Name :

       eventlog.hxx

   Abstract:

       This file defines functions and types required for
        logging events to the event logger.

   Author:

           Murali R. Krishnan    ( MuraliK )    27-Sept-1994

   Revision History:
        MuraliK     21-Nov-1994     Ported to common dll

   --*/

# ifndef _EVENTLOG_HXX_
# define _EVENTLOG_HXX_

#include <windows.h>
# include "datetime.hxx" // for Win95 object


/***********************************************************
 *    Type Definitions
 ************************************************************/

/*********************************************
 *    class EVENT_LOG
 *
 *    Declares a event log object.
 *    This object provides an interface for logging messages
 *     to the System EventLog file globally for given program.
 *
 ************************************************/

class dllexp EVENT_LOG  {

  private:

        DWORD     m_ErrorCode;     // error code for last operation
        HANDLE    m_hEventSource;  // handle for reporting events

        //
        // win95
        //

        HANDLE                      m_hLogFile;
        PASCLOG_DATETIME_CACHE      m_pDateTimeCache;

    public:

        EVENT_LOG( IN LPCTSTR lpszSourceName);   // name of source for event log

       ~EVENT_LOG( VOID);

        VOID
        LogEvent(
           IN DWORD  idMessage,                  // id for log message
           IN WORD   cSubStrings,                // count of substrings
           IN const CHAR * apszSubStrings[],     // substrings in the message
           IN DWORD  errCode = 0);               // error code if any

        BOOL Success( VOID) const
        { return ( m_ErrorCode == NO_ERROR); }

        DWORD GetErrorCode( VOID) const
        { return ( m_ErrorCode); }

    private:

        VOID
        LogEventPrivate(
            IN DWORD idMessage,
            IN WORD  wEventType,
            IN WORD  cSubStrings,
            IN const CHAR * apszSubStrings[],
            IN DWORD  errCode);

        HANDLE
        RegisterEventSourceChicagoStyle(
            IN LPCSTR   lpszSource,
            IN PHANDLE  hFile
            );

        BOOL
        ReportEventChicagoStyle(
                IN HANDLE       hEventSource,
                IN HANDLE       hLogFile,
                IN DWORD        idMessage,
                IN LPCSTR *     apszSubStrings,
                IN DWORD        dwErrorCode
                );
};


typedef EVENT_LOG * LPEVENT_LOG;


# endif // _EVENTLOG_HXX_