CFMCPopupMenu is shown multiple times if the menu key (VK_APPS) is pressed multiple times

Hello,
I have a problem with the CFMCPopupMenu in a Visual Studio Professional 2013 Update 4 created MFC DLL (Regular DLL using shared MFC DLL) and in a dialog based MFC application (others I didn't test - maybe in an SDI application too).
If the menu key (VK_APPS) is pressed multiple times, the context menu is created and shown multiple times.
When pressing the Alt (VK_MENU) key or clicking with the mouse buttons the menu is not shown multiple times.
It seems to be bug in CDialogImpl::PreTranslateMessage case WM_CONTEXTMENU where it is tested if a popup menu is already shown
and if there is an active popup menu this popup menu is closed, but only if the pMsg->wParam == VK_MENU.
The problem occurs in a dialog based MFC application and in dialog's in regular DLL's.
In case of MFC MDI applications the problem does not occur,
because in the CFrameImpl::ProcessKeyboard the key is passed to the popup menu for processing pActivePopupMenu->SendMessage(WM_KEYDOWN, nKey); and eaten up.
You can reproduce the problem in the following way:
1. Create a dialog based MFC application with the Visual Studio 2013 wizard.
2. Add a menu IDR_MENU1 to the resource.
3. Add a ON_WM_CONTEXTMENU / OnContextMenu message handler to the dialog.
4. Insert the following code into the OnContextMenu handler of the dialog:
_ASSERT(!CMFCPopupMenu::GetSafeActivePopupMenu());
CMenu m;
m.LoadMenu(IDR_MENU1);
CMFCPopupMenu* pPopupMenu = new CMFCPopupMenu;
pPopupMenu->SetAutoDestroy(FALSE);
VERIFY(pPopupMenu->Create(this, 100, 100, m.GetSafeHmenu(), TRUE, TRUE));
5. Compile and start the application and press the Menu Key (VK_APPS) multiple times.
-> You run into the ASSERT.
If you press the Alt-Key or left click with the mouse multiple times all is fine.
You can also add a tracepoint in the constructor and destructor to see that the CMFCPopup menu is created multiple times if the Menu-Key is pressed.
Kind regards,
Andreas.
Andreas

Hi Andreas,
Thanks for posting in MSDN forum.
Yes, I can reproduce this issue on my side. After look into the afxdialogimpl.cpp and afxframeimpl.cpp file, It really is a issue in the dialog message translate. I have no workaround to avoid this. But maybe we can try to use
CMenu class and handle WM_RBUTTONDOWN message instead of WM_CONTEXTMENU.
void CMFCPopupMenuTestDlg::OnRButtonDown(UINT nFlags, CPoint point)
// TODO: Add your message handler code here and/or call default
CMenu menu;
VERIFY(menu.LoadMenu(IDR_MENU1)); //IDR_MENU_POPUP是新建菜单ID
CMenu* popup=menu.GetSubMenu(0);
ClientToScreen(&point);
popup->TrackPopupMenu(TPM_LEFTALIGN|TPM_RIGHTBUTTON, point.x, point.y, this );
CDialogEx::OnRButtonDown(nFlags, point);
By using this, we can avoid the VK_APP message caused multi pop up menu.
Also have you tried submit this issue to Microsoft connect?
https://connect.microsoft.com/VisualStudio
Best regards,
Shu Hu
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