如何在MFC中的应用程序中对Windows重新排序

Question

Let's say that there are several different Windows ( CWnd ) open in a software, and the pointers to all active windows are saved in std::vector<Node> tabsInfo . Here is a portion of code for Node :

struct typedef Node {
...
CWnd *pWnd;
...
}

I have a handler to update the Z-order of all active windows using tabsInfo , which looks like this:

for (size_t i = tabsInfo.size(); i > 1; i--) {
        Node *pN_cur = &tabsInfo.at(i - 1);
        Node *pN_next = &tabsInfo.at(i - 2);
        ret = pN_cur->pWnd->SetWindowPos(pN_next->pWnd, NULL, NULL, NULL, NULL, SWP_NOMOVE | SWP_NOSIZE);
        ASSERT(ret != 0); // Sanity check
    }

However, when I debug them, even though they run without error, it makes no changes to the ordering of all windows.

Am I misunderstanding on how to use SetWindowPos ? When I looked other questions answered (which deals with buttons inside dialogs instead of windows), they gave the similar solution, but it doesn't seem to work here.

Answer 1

For anyone who have the same problem, I added a few more lines, and it worked:

for (int i = tabsInfo.size() - 1; i >= 0; i--) {
        Window_Node *pWN = &tabsInfo.at(i);
        if (tabsInfo.at(i).checked) { // Ignore this line. This is program-specific
            WINDOWPLACEMENT wp = {};
            wp.length = sizeof(WINDOWPLACEMENT);
            pWN->pWnd->GetParentFrame()->GetWindowPlacement(&wp);
            wp.showCmd=SW_RESTORE;                                                                                   
            pWN->pWnd->GetParentFrame()->SetWindowPlacement(&wp);
            ret = pWN->pWnd->GetParentFrame()->SetWindowPos(NULL, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
            ASSERT (ret != 0);
        } else {
        pWN->pWnd->GetParentFrame()->ShowWindow(SW_MINIMIZE);
        }
    }
}

Hope it helps someone :)