How to reorder windows in an application in MFC - c++

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 :)