C++/Win32 枚举属于我的进程的窗口 &关闭它们

Question

我有一个 Windows 应用程序，其中嵌入了一个 Web 浏览器（Internet Explorer）。可以通过 IPC 从另一个进程关闭该应用程序。除了嵌入式 Web 浏览器可能显示弹出对话框窗口（例如，在保存内容期间）的情况外，它工作得很好。在这种情况下，当我的应用程序尝试通过 IPC 关闭外部请求时，它会崩溃。 （在内部，它只是将 WM_CLOSE 消息发送给自身。）

鉴于此，我想提出一种方法来枚举属于我的进程的所有窗口，并在关闭我的进程本身之前先关闭它们。问题是，如何枚举属于我的进程的所有窗口以关闭它们？

Answer 1

好吧，我想我自己得到了。如果有人感兴趣的话，这是：

#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

当您希望进程退出时，只需调用ExitProcess即可。无论当时打开什么窗口，它们都会消失。