我意识到控制台win32应用程序没有干净利落,所以我尝试切换到仅限消息的窗口。我正在从另一个进程启动应用程序并尝试彻底杀死它。
这是win32应用程序,它在启动时生成一个calc.exe,在干净关闭时,它应该杀死calc.exe
LRESULT CALLBACK WindowProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_USER: PostQuitMessage (0); break;
default: return DefWindowProc (hWnd, message, wParam, lParam);break;
}
return 0;
}
int CALLBACK WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int show)
{
WNDCLASSEX wc = { 0 };
wc.cbSize = sizeof (WNDCLASSEX);
wc.lpfnWndProc = WindowProc;
wc.hInstance = hInstance;
wc.lpszClassName = L"WindowClass1";
RegisterClassEx (&wc);
HWND hWnd = CreateWindowEx (NULL,
L"WindowClass1", // name of the window class
L"Our First Windowed Program", // title of the window
0,
//WS_OVERLAPPEDWINDOW, // window style
300,300,500,400,
HWND_MESSAGE,
//NULL, // parent window, NULL
NULL, hInstance, NULL);
//ShowWindow (hWnd, SW_HIDE);
PROCESS_INFORMATION pi;
CreateWindowProcess (L"calc.exe", pi); // helper class to createprocess
MSG msg = { 0 };
while (true)
{
if (PeekMessage (&msg, 0, 0, 0, PM_REMOVE))
{
if (WM_QUIT == msg.message)
break;
TranslateMessage (&msg);
DispatchMessage (&msg);
}
}
// terminate the spawn process, this is not called cleanly
TerminateProcess (pi.hProcess, 0);
return (int)msg.wParam;
}
我创建了一个c#程序,通过发送WM_QUIT / WM_CLOSE / WM_USER消息来干净地启动/终止应用程序(calc.exe被破坏)。除非窗口可见(WS_OVERLAPPED和ShowWindow为true),否则Win32应用程序不会收到消息。收到PostMessage WM_QUIT但是calc.exe没有被销毁,这意味着它不是一个干净的退出。
我应该如何从C#app中彻底杀死它?
class Program
{
[DllImport ("user32.dll")]
public static extern bool PostMessage (IntPtr hwnd, uint msg, int wparam, int lparam);
[DllImport ("User32.dll")]
public static extern int SendMessage (IntPtr hWnd, uint uMsg, int wParam, int lParam);
static void Main (string [] args)
{
try
{
Process myProcess;
myProcess = Process.Start ("My.exe");
// Display physical memory usage 5 times at intervals of 2 seconds.
for (int i = 0; i < 3; i++)
{
if (myProcess.HasExited) break;
else
{
// Discard cached information about the process.
myProcess.Refresh ();
Thread.Sleep (4000);
Console.WriteLine ("Sending Message");
const int WM_USER = 0x0400;
const int WM_CLOSE = 0xF060; // Command code for close window
const int WM_QUIT = 0x0012;
// Received only when windows is visible
//int result = SendMessage (myProcess.MainWindowHandle, WM_USER, 0, 0);
// not clean exit
PostMessage (myProcess.MainWindowHandle, WM_QUIT, 0, 0);
// doesn't receive
SendMessage (myProcess.MainWindowHandle, WM_QUIT, 0, 0);
}
}
}
}
}
答案 0 :(得分:1)
Windows上的进程实际上没有“MainWindow”。 Process.MainWindowHandle是C#进行猜测,它通过查看相关进程是否有一个焦点窗口来猜测 - 这只会找到可见的窗口。使用WM_DESTROY
查找要关闭的窗口句柄。
接下来,当窗口关闭时,它不会自动尝试退出当前线程消息循环。您需要处理PostQuitMessage
来致电GetMessage
。
在您的消息循环中使用PeekMessage
而不是PeekMessage
如果您没有进行任何其他工作,因为如果没有消息意味着应用程序线程永远不会有机会,WM_CLOSE
会立即返回睡觉。
通过这些更改,您可以将WM-QUIT
简单地发布到有效窗口句柄,因为它将被销毁,发布$("#P15").find("#C").css({fill: "#333333"});
消息以退出消息循环,并终止计算过程正确。