What message I receive when I kill my program with task manager
c#, dll, winapi, windows-messages
Solution
Your process will not get any messages in case if it is being killed. Start on TerminateProcess - see my highlight:
The TerminateProcess function is used to unconditionally cause a process to exit. The state of global data maintained by dynamic-link libraries (DLLs) may be compromised if TerminateProcess is used rather than ExitProcess.
This function stops execution of all threads within the process and requests cancellation of all pending I/O...
EDIT: Hans Passant comment on way tasks terminated - You only get WM_CLOSE when using the Applications tab in task manager. Killing it from the Processes tab is a rude termination (TerminateProcess).
Problem
So I have a C++ dll, that I am using in my c# application, for monitoring Windows Messages. I want to know if WM_CLOSE and WM_QUERYENDSESSION are send because I can't see that from a C# application. If I get one of these messages, I want to do some cleanup with my files but the problem is when I kill it with TM the functions don't work. It seams that I don't get the messages. I think the problem is that Task Manager sends a message to the C# app and not to the c++ dll. Some Code: c++: ``` typedef void (*CLOSING_FUNCTION)(); CLOSING_FUNCTION myClosingFunction; typedef void (*SHUTDOWN_FUNCTION)(); SHUTDOWN_FUNCTION myShutdownFunction; LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { switch(message) { case WM_CREATE: return 0; case WM_CLOSE: myClosingFunction(); return 0; case WM_QUERYENDSESSION: myShutdownFunction(); return 1; case WM_DESTROY: myClosingFunction(); PostQuitMessage(0); return 0; } return DefWindowProc(hwnd, message, wParam, lParam); } ``` c#: ``` [UnmanagedFunctionPointer(CallingConvention.Cdecl)] private delegate void Close_Function(); private static Close_Function myCloseDelegate; [UnmanagedFunctionPointer(CallingConvention.Cdecl)] private delegate void Shutdown_Function(); private static Shutdown_Function myShutdownDelegate; static void StartMonotoring() { myCloseDelegate = Close; myShutdownDelegate = Shutdown; InterceptMessages(myCloseDelegate, myShutdownDelegate); } static void Close(); static void Shutdown(); ```