EVENTS.C

/******************************************************************************\ 
*       This is a part of the Microsoft Source Code Samples. 
*       Copyright 1992 - 1998 Microsoft Corporation. 
*       All rights reserved.  
*       This source code is only intended as a supplement to  
*       Microsoft Development Tools and/or WinHelp documentation. 
*       See these sources for detailed information regarding the  
*       Microsoft samples programs. 
\******************************************************************************/ 
 
//+--------------------------------------------------------------------------- 
// 
//  File:       events.c 
// 
//  Contents: 
// 
//  Classes: 
// 
//  Functions: 
// 
//---------------------------------------------------------------------------- 
 
#include "pop3srvp.h" 
#pragma hdrstop 
 
HANDLE  hEventLog = INVALID_HANDLE_VALUE; 
DWORD   LoggingLevel = 1; 
WCHAR   EventSourceName[] = TEXT("Pop3 Server"); 
 
#define MAX_EVENT_STRINGS 8 
 
//+--------------------------------------------------------------------------- 
// 
//  Function:   InitializeEvents 
// 
//  Synopsis:   Connects to event log service 
// 
//  Arguments:  (none) 
// 
//  History:    1-03-95   RichardW   Created 
// 
//  Notes: 
// 
//---------------------------------------------------------------------------- 
BOOL 
InitializeEvents(void) 
{ 
    hEventLog = RegisterEventSource(NULL, EventSourceName); 
    if (hEventLog) 
    { 
        return(TRUE); 
    } 
    DebugLog((DEB_ERROR, "Could not open event log, error %d\n", GetLastError())); 
    return(FALSE); 
} 
 
 
//+--------------------------------------------------------------------------- 
// 
//  Function:   ReportServiceEvent 
// 
//  Synopsis:   Reports an event to the event log 
// 
//  Arguments:  [EventType]       -- EventType (ERROR, WARNING, etc.) 
//              [EventId]         -- Event ID 
//              [SizeOfRawData]   -- Size of raw data 
//              [RawData]         -- Raw data 
//              [NumberOfStrings] -- number of strings 
//              ...               -- PWSTRs to string data 
// 
//  History:    1-03-95   RichardW   Created 
// 
//  Notes: 
// 
//---------------------------------------------------------------------------- 
DWORD 
ReportServiceEvent( 
    IN WORD EventType, 
    IN DWORD EventId, 
    IN DWORD SizeOfRawData, 
    IN PVOID RawData, 
    IN DWORD NumberOfStrings, 
    ... 
    ) 
{ 
    va_list arglist; 
    ULONG i; 
    PWSTR Strings[ MAX_EVENT_STRINGS ]; 
    DWORD rv; 
 
    if (!hEventLog) 
    { 
        DebugLog((DEB_ERROR, "Cannot log event, no handle!\n")); 
        return((DWORD)-1); 
    } 
 
    // 
    // We're not supposed to be logging this, so nuke it 
    // 
    if ((LoggingLevel & (1 << EventType)) == 0) 
    { 
        return(0); 
    } 
 
    // 
    // Look at the strings, if they were provided 
    // 
    va_start( arglist, NumberOfStrings ); 
 
    if (NumberOfStrings > MAX_EVENT_STRINGS) { 
        NumberOfStrings = MAX_EVENT_STRINGS; 
    } 
 
    for (i=0; i<NumberOfStrings; i++) { 
        Strings[ i ] = va_arg( arglist, PWSTR ); 
    } 
 
 
    // 
    // Report the event to the eventlog service 
    // 
 
    if (!ReportEvent(   hEventLog, 
                        EventType, 
                        0,            // event category 
                        EventId, 
                        NULL, 
                        (WORD)NumberOfStrings, 
                        SizeOfRawData, 
                        Strings, 
                        RawData) ) 
    { 
        rv = GetLastError(); 
        DebugLog((DEB_ERROR,  "ReportEvent( %u ) failed - %u\n", EventId, GetLastError() )); 
 
    } 
    else 
    { 
        rv = ERROR_SUCCESS; 
    } 
 
    return rv; 
} 
 
BOOL 
ShutdownEvents(void) 
{ 
    return(DeregisterEventSource(hEventLog)); 
}