Recently we moved our C++ project, which uses MFC, from VS2008 to VS2010.
And there is a small issue: in our MDI interface, after we call a function CWinApp::OpenDocumentFile, the app not only opens the file, but also creates a new empty MDI window.
If we change the toolset (Project properties -> General -> Platform toolset) back to v90 (VS2008), we do not experience this problem.
Maybe someone saw the same issue and knows, what we are doing wrong?
Solved. maybe the explanation will help someone:
The problem was in MFC function:
CDocument* CDocManager::OpenDocumentFile(LPCTSTR lpszFileName)
in VS2008 it called a function
return pBestTemplate->OpenDocumentFile(szPath);
in VS2010 it calls another function (with different number of parameters)
return pBestTemplate->OpenDocumentFile(szPath, bAddToMRU, TRUE);
which we didn't override in our own implementation of CMultiDocTemplate
effectively there is a change in the file docmgr.cpp which calls the opendocumentfile function.
if you derived a class from CMultiDocTemplate watch out for this changes.
In fact your post helped me to find an error in my application.
