


Detect Win32 Process Creation/Termination without a Kernel-Mode Driver in C
While NT kernel-mode drivers offer a comprehensive API for process creation and termination notifications, it is possible to achieve similar functionality in C using only Win32 API functions.
Using WMI
WMI (Windows Management Instrumentation) provides a rich set of event notifications, including those related to process creation and termination. However, WMI may not be suitable for all scenarios, especially if you need to track process termination only.
Using a Callback
A more efficient approach is to use a callback function to wait for a specific process to terminate. This can be achieved with the following steps:
- Call OpenProcess to obtain a handle to the process you want to monitor.
- Call RegisterWaitForSingleObject with the process handle as a parameter. Specify WaitOrTimerCallback as the callback function to be executed when the process terminates.
- The WaitOrTimerCallback function will be called once the process terminates.
Example Code
VOID CALLBACK WaitOrTimerCallback( _In_ PVOID lpParameter, _In_ BOOLEAN TimerOrWaitFired ) { MessageBox(0, L"The process has exited.", L"INFO", MB_OK); return; } DWORD dwProcessID = 1234; HANDLE hProcHandle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, dwProcessID); HANDLE hNewHandle; RegisterWaitForSingleObject(&hNewHandle, hProcHandle , WaitOrTimerCallback, NULL, INFINITE, WT_EXECUTEONLYONCE);
This code will display a message box once the process with ID dwProcessID terminates.
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