- 1 year ago
How can I get in C++ the same behavior of `wevtutil qe Application`?
To achieve the same behavior as wevtutil qe Application
in C++, you can use the Windows Event Log API. Here's an example of how you can retrieve event log information using C++:
cpp#include <Windows.h>
#include <winevt.h>
#include <iostream>
#pragma comment(lib, "wevtapi.lib")
int main()
{
// Open the event log
EVT_HANDLE hLog = EvtOpenLog(nullptr, L"Application", EvtOpenLogChannelPath | EvtOpenReadOnly);
if (hLog == nullptr)
{
std::cout << "Failed to open event log" << std::endl;
return 1;
}
// Set the query filter
LPCWSTR query = L"*";
EVT_HANDLE hQuery = EvtQuery(nullptr, L"Application", query, EvtQueryChannelPath | EvtQueryReverseDirection);
if (hQuery == nullptr)
{
std::cout << "Failed to create query" << std::endl;
EvtClose(hLog);
return 1;
}
// Process the events
const DWORD bufferSize = 4096;
EVT_HANDLE hEvents[bufferSize];
DWORD returned;
while (EvtNext(hQuery, bufferSize, hEvents, INFINITE, 0, &returned))
{
for (DWORD i = 0; i < returned; ++i)
{
DWORD bufferSize;
WCHAR buffer[bufferSize];
if (EvtFormatMessage(hEvents[i], nullptr, 0, 0, nullptr, EvtFormatMessageEvent, bufferSize, buffer, &bufferSize) != FALSE)
{
std::wcout << buffer << std::endl;
}
EvtClose(hEvents[i]);
}
}
// Clean up
EvtClose(hQuery);
EvtClose(hLog);
return 0;
}
In this example:
The code opens the event log with
EvtOpenLog()
using the log name"Application"
. You can replace it with other log names like"System"
or"Security"
if needed.It creates a query using
EvtQuery()
to retrieve events from the log. The query uses"*"
as the filter to retrieve all events. Adjust the query as per your requirements.The code then uses
EvtNext()
to retrieve events in batches. It iterates over the events and usesEvtFormatMessage()
to format and print the event message to the console.The process continues until there are no more events to retrieve.
Finally, it closes the query and log handles with
EvtClose()
.
Make sure to include the necessary Windows and Event Log API headers and link against the wevtapi.lib
library.
With this code, you should be able to retrieve event log information in C++ similar to the behavior of wevtutil qe Application
.