什么消息我收到的时候我杀了我的程序与任务管理器 [英] What message I receive when I kill my program with task manager

问题描述

所以我有一个C ++ DLL，我是用我的C＃应用​​程序，用于监视Windows消息。我想知道，如果WM_CLOSE和WM_QUERYENDSESSION都送，因为我不能看到，从C＃应用程序。如果我得到这些消息之一，我想要做一些清理我的文件，但问题是，当我TM杀了它的功能不工作。它接缝，我没有得到消息。我觉得问题是，任务管理器将消息发送到C＃应用程序，而不是在C ++ DLL

一些代码：

C ++：

 无效的typedef（* CLOSING_FUNCTION）（）; 
 CLOSING_FUNCTION myClosingFunction; 
 
无效的typedef（* SHUTDOWN_FUNCTION）（）; 
 SHUTDOWN_FUNCTION myShutdownFunction; 
 
 LRESULT CALLBACK的WndProc（HWND HWND，UINT的消息，WPARAM wParam参数，LPARAM lParam的）
 {
开关（消息）
 {
 
案例WM_CREATE：
返回0; 
 
情况下WM_CLOSE：
 myClosingFunction（）; 
返回0; 
 
情况下WM_QUERYENDSESSION：
 myShutdownFunction（）; 
返回1; 
 
情况下WM_DESTROY：
 myClosingFunction（）; 
 PostQuitMessage（0）; 
返回0; 
} 
 
返回DefWindowProc函数（HWND，消息的wParam，lParam的）; 
} 
  

C＃：

  [UnmanagedFunctionPointer（CallingConvention.Cdecl）] 
私人委托无效Close_Function（）; 
私有静态Close_Function myCloseDelegate; 
 
 [UnmanagedFunctionPointer（CallingConvention.Cdecl）] 
私人委托无效Shutdown_Function（）; 
私有静态Shutdown_Function myShutdownDelegate; 
静态无效StartMonotoring（）
 {
 myCloseDelegate =关闭; 
 myShutdownDelegate =关机; 
 
 InterceptMessages（myCloseDelegate，myShutdownDelegate）; 
} 
 
静态无效关闭（）; 
静态无效关机（）; 
  

解决方案

您进程不会得到，如果它的情况下，任何消息被杀害。开始在 TerminateProcess - 看到我的亮点：

的

TerminateProcess函数来无条件地使一个进程退出。如果TerminateProcess使用，而不是ExitProcess的全局数据的动态链接库（DLL）中所保存的状态可能会受到影响。

这功能的停止所有线程的执行在过程中并要求所有未决的I / O ...

取消

编辑：在途中任务汉斯帕桑特评论终止 - 使用任务管理器应用程序选项卡时，您只能得到WM_CLOSE。从进程选项卡杀死它是一个粗鲁的终端（TerminateProcess）。

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();

解决方案

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).

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