Mfc get modal dialog list

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C++

MFC

unit-testing

Hi,

I am working on unit test with MFC. My software is a SDI.

I have 2 threads : the first one is the graphic thread and the second one a unit test procedure which reproduce a user behavior. It is working well when there isn't modal dialog, I use SendMessage (to simulate click on button, or change text, etc.) which is blocking until the message has been treated so I haven't any sync issue.

But when the button opens a Modal CDialog I can't use SendMessage because the unit test thread is going to be blocked as long as the modal dialog is opened. So I use PostMessage and Sleep. And now my problem is to get the pointer of the current opened CDialog.

What I have tried:

Here is the code of the unit test

bool UnitTestBoite()
{
   // Here I am in unit test thread
   CFrameWnd *pMainFrame = (CFrameWnd *)AfxGetMainWnd();
   // Post Message to notify the button ID_INSERER_BOITE is clicked
   pMainFrame->PostMessageW(WM_COMMAND, MAKELONG(ID_INSERER_BOITE, 0), 0);
   // In the handler of ID_INSERER_BOITE
   // there is something like CDialog dlg(pMainFrame, IDD_BASE_BOITE); dlg.DoModal();
   Sleep(1000);
   UINT myModalTemplateId = IDD_BASE_BOITE;
   ...

To get modal dialog pointer I tried :

CWnd* pChild = pMainFrame->GetWindow(GW_CHILD);
while (pChild != nullptr)
{
    // Retrieve template ID
    UINT nResourceId = GetWindowLong(pChild->GetSafeHwnd(), GWL_ID);
    if (nResourceId == myModalTemplateId )
        break;
    pChild = pChild->GetWindow(GW_HWNDNEXT);
}
if (pChild == nullptr)
    return false;

or

HWND hwndForeGround = ::GetForegroundWindow();
// Retrieve template ID
UINT nResourceId = GetWindowLong(hwndForeGround, GWL_ID);
if (nResourceId != myModalTemplateId )
   return false;

or

CWnd *pModal = pMainFrame_->GetForegroundWindow();
  // Retrieve template ID
  UINT nResourceId = GetWindowLong(pModal->GetSafeHwnd(), GWL_ID);
  if (nResourceId != myModalTemplateId )
     return false;

None of these code snippet worked... The last solution I have thought was to make all my CDialog classes inherits from a custom class and register all opened CDialog, but it is a bit invasive... Is there an "elegant" means to do that ?

Thank for reading, Lucas.