Question

我有一个Windows应用程序，其中嵌入了Web浏览器（Internet Explorer）。可以通过IPC从另一个进程关闭应用程序。除了嵌入式Web浏览器可能正在显示弹出对话窗口（例如，在保存内容期间）的情况之外，它工作得很好。在那种情况下，我的应用程序在尝试通过IPC从外部请求关闭时崩溃。（在内部，它只是将WM_CLOSE消息发布给自己。）

鉴于此，我想到了一种方法来枚举属于我的进程的所有窗口并在关闭我的进程之前先关闭它们。问题是，如何为了关闭它而枚举属于我的进程的所有窗口？

Answer 1

好吧，我想我自己也明白了。如果有人有兴趣，请点击这里：

#define SIZEOF(f) (sizeof(f) / sizeof(f[0]))
typedef struct _ENUM_POPUPS_INFO{
    DWORD dwProcID;
    HWND hThisWnd;
    int nNextHWNDIndex;
    HWND hFoundHWNDs[256];
}ENUM_POPUPS_INFO;

void CloseAllOpenPopups(HWND hWnd, int dwmsWait)
{
    //'hWnd' = our main window handle (we won't close it)
    //'dwmsWait' = maximum wait time in milliseconds, or -1 to wait for as long as needed
    ENUM_POPUPS_INFO epi = {0};
    BOOL bR;
    int i, iIteration;
    HWND hWndRoot, hWndActivePopup;

    DWORD dwmsTickBegin = GetTickCount();

    for(iIteration = 0;; iIteration = 1)
    {
        //Get our process ID
        memset(&epi, 0, sizeof(epi));
        epi.hThisWnd = hWnd;
        epi.dwProcID = GetCurrentProcessId();

        bR = EnumWindows(EnumPopupWindowsProc, (LPARAM)&epi);

        //Did we get any
        if(epi.nNextHWNDIndex == 0)
            break;

        //Wait on a second and later iteration
        if(iIteration > 0)
        {
            if(dwmsWait != -1)
            {
                DWORD dwmsTick = GetTickCount();
                int nmsDiff = abs((long)(dwmsTick - dwmsTickBegin));
                if(nmsDiff >= dwmsWait)
                {
                        //Timed out
                break;
                }

                //Wait
                Sleep(min(100, dwmsWait - nmsDiff));
            }
            else
            {
                //Wait
                Sleep(100);
            }
        }

        //Go through all windows found
            for(i = 0; i < epi.nNextHWNDIndex; i++)
        {
            //Get root owner
            hWndRoot = GetAncestor(epi.hFoundHWNDs[i], GA_ROOTOWNER);
            if(!hWndRoot)
                continue;

            //Get it's active popup
            hWndActivePopup = GetLastActivePopup(hWndRoot);
            if(!hWndActivePopup)
                continue;

            //Close it
            PostMessage(hWndActivePopup, WM_CLOSE, 0, 0);
        }
    }
}    


BOOL CALLBACK EnumPopupWindowsProc(HWND hWnd, LPARAM lParam)
{
    ENUM_POPUPS_INFO* pEPI = (ENUM_POPUPS_INFO*)lParam;

    //Get process ID of the window
    DWORD dwProcID = 0;
    GetWindowThreadProcessId(hWnd, &dwProcID);

    //We need this window only if it's our process
    if(dwProcID == pEPI->dwProcID &&
        pEPI->hThisWnd != hWnd &&
        ((GetWindowLongPtr(hWnd, GWL_STYLE) & (WS_VISIBLE | WS_POPUP | WS_CAPTION)) == (WS_VISIBLE | WS_POPUP | WS_CAPTION)))
    {
        if(pEPI->nNextHWNDIndex >= SIZEOF(pEPI->hFoundHWNDs))
        {
            //Stop, we're full
            return FALSE;
        }

        //Add it
        pEPI->hFoundHWNDs[pEPI->nNextHWNDIndex] = hWnd;
        pEPI->nNextHWNDIndex++;
    }

    return TRUE;
}

Answer 2

如果您希望自己的流程退出，只需致电ExitProcess即可。当时窗户可能打开并不重要，它们都会消失。

C ++ / Win32枚举属于我的进程和窗口的窗口关闭他们

2 个答案: