How to get the parent structure as Spy++ gives it?












2














In our code, a C++ class that is derived from CMDIChildWnd is instantiated and its Create() function is called, which is actually CMDIChildWnd::Create(). The 5th parameter pParentWnd is being set to a CMDIFrameWnd object. This in turn (within the MFC code) sets up a CREATESTRUCT object, sets it's hwndParent to that parameter and then calls PreCreateWindow() with that object passed as one of the parameters.



However, when going up the parent window list using CWnd::GetParent() (original) GetAncestor(hwnd, GA_PARENT) (just a try, since the original didn't work and this code is 20+ years old) and even GetWindow(hwnd, GW_OWNER) just to see if it was setting the window's owner for some reason. In each case, I do not see the handle which is associated with the CMDIFrameWnd object. Instead, the parent shown is the desktop, and owner is NULL.



Using Spy++, it shows what I was expecting. How would I get the layout given by Spy++ programmatically?






windows winapi mfc







share|improve this question




















  • 1




    AfxGetMainWnd() should return the main frame window. CMDIChildWnd is usually passed to CMultiDocTemplate, I am not familiar with the usage you are describing.
    – Barmak Shemirani
    Nov 12 '18 at 7:44












  • Use Spy++ to see the true window hierarchy. That will reflect the relationship without any code in between, that may or may not do something to be helpful.
    – IInspectable
    Nov 12 '18 at 10:11










  • @IInspectable, I have used spy++, and it shows what I want to see, but how do I get that answer in code?
    – Adrian
    Nov 12 '18 at 15:03












  • @BarmakShemirani, I'm not looking for the root CMDIFrameWnd. I'm looking for the one that is the parent to a particular CMDIChildWnd. We have some CMDIFrameWnd which are parented to other CMDIFrameWnd windows.
    – Adrian
    Nov 12 '18 at 16:07










  • MDI is odd, it comes with its own API. See if Multiple Document Interface has the answers you are looking for.
    – IInspectable
    Nov 12 '18 at 16:20
















2














In our code, a C++ class that is derived from CMDIChildWnd is instantiated and its Create() function is called, which is actually CMDIChildWnd::Create(). The 5th parameter pParentWnd is being set to a CMDIFrameWnd object. This in turn (within the MFC code) sets up a CREATESTRUCT object, sets it's hwndParent to that parameter and then calls PreCreateWindow() with that object passed as one of the parameters.



However, when going up the parent window list using CWnd::GetParent() (original) GetAncestor(hwnd, GA_PARENT) (just a try, since the original didn't work and this code is 20+ years old) and even GetWindow(hwnd, GW_OWNER) just to see if it was setting the window's owner for some reason. In each case, I do not see the handle which is associated with the CMDIFrameWnd object. Instead, the parent shown is the desktop, and owner is NULL.



Using Spy++, it shows what I was expecting. How would I get the layout given by Spy++ programmatically?






windows winapi mfc







share|improve this question




















  • 1




    AfxGetMainWnd() should return the main frame window. CMDIChildWnd is usually passed to CMultiDocTemplate, I am not familiar with the usage you are describing.
    – Barmak Shemirani
    Nov 12 '18 at 7:44












  • Use Spy++ to see the true window hierarchy. That will reflect the relationship without any code in between, that may or may not do something to be helpful.
    – IInspectable
    Nov 12 '18 at 10:11










  • @IInspectable, I have used spy++, and it shows what I want to see, but how do I get that answer in code?
    – Adrian
    Nov 12 '18 at 15:03












  • @BarmakShemirani, I'm not looking for the root CMDIFrameWnd. I'm looking for the one that is the parent to a particular CMDIChildWnd. We have some CMDIFrameWnd which are parented to other CMDIFrameWnd windows.
    – Adrian
    Nov 12 '18 at 16:07










  • MDI is odd, it comes with its own API. See if Multiple Document Interface has the answers you are looking for.
    – IInspectable
    Nov 12 '18 at 16:20














2












2








2


0





In our code, a C++ class that is derived from CMDIChildWnd is instantiated and its Create() function is called, which is actually CMDIChildWnd::Create(). The 5th parameter pParentWnd is being set to a CMDIFrameWnd object. This in turn (within the MFC code) sets up a CREATESTRUCT object, sets it's hwndParent to that parameter and then calls PreCreateWindow() with that object passed as one of the parameters.



However, when going up the parent window list using CWnd::GetParent() (original) GetAncestor(hwnd, GA_PARENT) (just a try, since the original didn't work and this code is 20+ years old) and even GetWindow(hwnd, GW_OWNER) just to see if it was setting the window's owner for some reason. In each case, I do not see the handle which is associated with the CMDIFrameWnd object. Instead, the parent shown is the desktop, and owner is NULL.



Using Spy++, it shows what I was expecting. How would I get the layout given by Spy++ programmatically?






windows winapi mfc







share|improve this question















In our code, a C++ class that is derived from CMDIChildWnd is instantiated and its Create() function is called, which is actually CMDIChildWnd::Create(). The 5th parameter pParentWnd is being set to a CMDIFrameWnd object. This in turn (within the MFC code) sets up a CREATESTRUCT object, sets it's hwndParent to that parameter and then calls PreCreateWindow() with that object passed as one of the parameters.



However, when going up the parent window list using CWnd::GetParent() (original) GetAncestor(hwnd, GA_PARENT) (just a try, since the original didn't work and this code is 20+ years old) and even GetWindow(hwnd, GW_OWNER) just to see if it was setting the window's owner for some reason. In each case, I do not see the handle which is associated with the CMDIFrameWnd object. Instead, the parent shown is the desktop, and owner is NULL.



Using Spy++, it shows what I was expecting. How would I get the layout given by Spy++ programmatically?






windows winapi mfc




windows winapi mfc






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 12 '18 at 21:58

























asked Nov 12 '18 at 5:10









Adrian

3,90322057




3,90322057








  • 1




    AfxGetMainWnd() should return the main frame window. CMDIChildWnd is usually passed to CMultiDocTemplate, I am not familiar with the usage you are describing.
    – Barmak Shemirani
    Nov 12 '18 at 7:44












  • Use Spy++ to see the true window hierarchy. That will reflect the relationship without any code in between, that may or may not do something to be helpful.
    – IInspectable
    Nov 12 '18 at 10:11










  • @IInspectable, I have used spy++, and it shows what I want to see, but how do I get that answer in code?
    – Adrian
    Nov 12 '18 at 15:03












  • @BarmakShemirani, I'm not looking for the root CMDIFrameWnd. I'm looking for the one that is the parent to a particular CMDIChildWnd. We have some CMDIFrameWnd which are parented to other CMDIFrameWnd windows.
    – Adrian
    Nov 12 '18 at 16:07










  • MDI is odd, it comes with its own API. See if Multiple Document Interface has the answers you are looking for.
    – IInspectable
    Nov 12 '18 at 16:20














  • 1




    AfxGetMainWnd() should return the main frame window. CMDIChildWnd is usually passed to CMultiDocTemplate, I am not familiar with the usage you are describing.
    – Barmak Shemirani
    Nov 12 '18 at 7:44












  • Use Spy++ to see the true window hierarchy. That will reflect the relationship without any code in between, that may or may not do something to be helpful.
    – IInspectable
    Nov 12 '18 at 10:11










  • @IInspectable, I have used spy++, and it shows what I want to see, but how do I get that answer in code?
    – Adrian
    Nov 12 '18 at 15:03












  • @BarmakShemirani, I'm not looking for the root CMDIFrameWnd. I'm looking for the one that is the parent to a particular CMDIChildWnd. We have some CMDIFrameWnd which are parented to other CMDIFrameWnd windows.
    – Adrian
    Nov 12 '18 at 16:07










  • MDI is odd, it comes with its own API. See if Multiple Document Interface has the answers you are looking for.
    – IInspectable
    Nov 12 '18 at 16:20








1




1




AfxGetMainWnd() should return the main frame window. CMDIChildWnd is usually passed to CMultiDocTemplate, I am not familiar with the usage you are describing.
– Barmak Shemirani
Nov 12 '18 at 7:44






AfxGetMainWnd() should return the main frame window. CMDIChildWnd is usually passed to CMultiDocTemplate, I am not familiar with the usage you are describing.
– Barmak Shemirani
Nov 12 '18 at 7:44














Use Spy++ to see the true window hierarchy. That will reflect the relationship without any code in between, that may or may not do something to be helpful.
– IInspectable
Nov 12 '18 at 10:11




Use Spy++ to see the true window hierarchy. That will reflect the relationship without any code in between, that may or may not do something to be helpful.
– IInspectable
Nov 12 '18 at 10:11












@IInspectable, I have used spy++, and it shows what I want to see, but how do I get that answer in code?
– Adrian
Nov 12 '18 at 15:03






@IInspectable, I have used spy++, and it shows what I want to see, but how do I get that answer in code?
– Adrian
Nov 12 '18 at 15:03














@BarmakShemirani, I'm not looking for the root CMDIFrameWnd. I'm looking for the one that is the parent to a particular CMDIChildWnd. We have some CMDIFrameWnd which are parented to other CMDIFrameWnd windows.
– Adrian
Nov 12 '18 at 16:07




@BarmakShemirani, I'm not looking for the root CMDIFrameWnd. I'm looking for the one that is the parent to a particular CMDIChildWnd. We have some CMDIFrameWnd which are parented to other CMDIFrameWnd windows.
– Adrian
Nov 12 '18 at 16:07












MDI is odd, it comes with its own API. See if Multiple Document Interface has the answers you are looking for.
– IInspectable
Nov 12 '18 at 16:20




MDI is odd, it comes with its own API. See if Multiple Document Interface has the answers you are looking for.
– IInspectable
Nov 12 '18 at 16:20












1 Answer
1






active

oldest

votes


















0














In MDI interface CMDIChildWnd is usually passed to CMultiDocTemplate, then we create a new window through CDocManager::OnFileNew, that in turn calls CFrameWnd::LoadFrame which passes NULL for child window's parent (at least in VS 2017)



We usually don't call mdi_child->Create directly, unless we initialize everything else manually. Perhaps you mean the base class CMDIChildWnd::Create is called, or you are able to override it.



In child window,



::GetAncestor(m_hWnd, GA_ROOT) or ::GetAncestor(m_hWnd, GA_ROOTOWNER)



Should return a reference to the main frame, otherwise use AfxGetMainWnd()






share|improve this answer





















  • Unfortunately, I didn't write this code. It is 5+ years old and I've been here only 3. mdi_child->Create() was called by our code. We are not loading a new file. We're generating a frame to be used by a Chromium CEF window. What sort of things would be initialized manually?
    – Adrian
    Nov 12 '18 at 22:08













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0














In MDI interface CMDIChildWnd is usually passed to CMultiDocTemplate, then we create a new window through CDocManager::OnFileNew, that in turn calls CFrameWnd::LoadFrame which passes NULL for child window's parent (at least in VS 2017)



We usually don't call mdi_child->Create directly, unless we initialize everything else manually. Perhaps you mean the base class CMDIChildWnd::Create is called, or you are able to override it.



In child window,



::GetAncestor(m_hWnd, GA_ROOT) or ::GetAncestor(m_hWnd, GA_ROOTOWNER)



Should return a reference to the main frame, otherwise use AfxGetMainWnd()






share|improve this answer





















  • Unfortunately, I didn't write this code. It is 5+ years old and I've been here only 3. mdi_child->Create() was called by our code. We are not loading a new file. We're generating a frame to be used by a Chromium CEF window. What sort of things would be initialized manually?
    – Adrian
    Nov 12 '18 at 22:08


















0














In MDI interface CMDIChildWnd is usually passed to CMultiDocTemplate, then we create a new window through CDocManager::OnFileNew, that in turn calls CFrameWnd::LoadFrame which passes NULL for child window's parent (at least in VS 2017)



We usually don't call mdi_child->Create directly, unless we initialize everything else manually. Perhaps you mean the base class CMDIChildWnd::Create is called, or you are able to override it.



In child window,



::GetAncestor(m_hWnd, GA_ROOT) or ::GetAncestor(m_hWnd, GA_ROOTOWNER)



Should return a reference to the main frame, otherwise use AfxGetMainWnd()






share|improve this answer





















  • Unfortunately, I didn't write this code. It is 5+ years old and I've been here only 3. mdi_child->Create() was called by our code. We are not loading a new file. We're generating a frame to be used by a Chromium CEF window. What sort of things would be initialized manually?
    – Adrian
    Nov 12 '18 at 22:08
















0












0








0






In MDI interface CMDIChildWnd is usually passed to CMultiDocTemplate, then we create a new window through CDocManager::OnFileNew, that in turn calls CFrameWnd::LoadFrame which passes NULL for child window's parent (at least in VS 2017)



We usually don't call mdi_child->Create directly, unless we initialize everything else manually. Perhaps you mean the base class CMDIChildWnd::Create is called, or you are able to override it.



In child window,



::GetAncestor(m_hWnd, GA_ROOT) or ::GetAncestor(m_hWnd, GA_ROOTOWNER)



Should return a reference to the main frame, otherwise use AfxGetMainWnd()






share|improve this answer












In MDI interface CMDIChildWnd is usually passed to CMultiDocTemplate, then we create a new window through CDocManager::OnFileNew, that in turn calls CFrameWnd::LoadFrame which passes NULL for child window's parent (at least in VS 2017)



We usually don't call mdi_child->Create directly, unless we initialize everything else manually. Perhaps you mean the base class CMDIChildWnd::Create is called, or you are able to override it.



In child window,



::GetAncestor(m_hWnd, GA_ROOT) or ::GetAncestor(m_hWnd, GA_ROOTOWNER)



Should return a reference to the main frame, otherwise use AfxGetMainWnd()







share|improve this answer












share|improve this answer



share|improve this answer










answered Nov 12 '18 at 21:58









Barmak Shemirani

20.8k42045




20.8k42045












  • Unfortunately, I didn't write this code. It is 5+ years old and I've been here only 3. mdi_child->Create() was called by our code. We are not loading a new file. We're generating a frame to be used by a Chromium CEF window. What sort of things would be initialized manually?
    – Adrian
    Nov 12 '18 at 22:08




















  • Unfortunately, I didn't write this code. It is 5+ years old and I've been here only 3. mdi_child->Create() was called by our code. We are not loading a new file. We're generating a frame to be used by a Chromium CEF window. What sort of things would be initialized manually?
    – Adrian
    Nov 12 '18 at 22:08


















Unfortunately, I didn't write this code. It is 5+ years old and I've been here only 3. mdi_child->Create() was called by our code. We are not loading a new file. We're generating a frame to be used by a Chromium CEF window. What sort of things would be initialized manually?
– Adrian
Nov 12 '18 at 22:08






Unfortunately, I didn't write this code. It is 5+ years old and I've been here only 3. mdi_child->Create() was called by our code. We are not loading a new file. We're generating a frame to be used by a Chromium CEF window. What sort of things would be initialized manually?
– Adrian
Nov 12 '18 at 22:08




















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