BUG: You receive a "Cannot find the file <FileName>" error message in Windows 95 or in Windows 98 when you open a document and the associated executable is an MFC application that has a long file name

MORE INFORMATION

Steps to reproduce the problem on a computer that is running Windows 95 or Windows 98

1. Select a new MFC AppWizard(exe) project to create an MDI application with a long project name.
2. At step 3 of the AppWizard select Automation Support.
3. Then at step 4 of the AppWizard, choose Advanced and specify a 3 letter file extension.
4. Build the application and run it once so the file type is registered by the call to RegisterShellFileTypes in InitInstance.
5. Save a file with the selected file extension and double-click to open it from the Windows Explorer.

/* Compile options needed: Default MFC applications.
*/ 

void CLongFileNameApp::EnableShellOpen()
{
   ASSERT(m_atomApp == NULL && m_atomSystemTopic == NULL); // do once

   CString strShortName;
   TCHAR szLongPathName[_MAX_PATH];
   ::GetModuleFileName(m_hInstance, szLongPathName, _MAX_PATH);
   if (::GetShortPathName(szLongPathName,
       strShortName.GetBuffer(_MAX_PATH), _MAX_PATH) == 0)
   {
      // Rare failure case (especially on not-so-modern file systems)
      strShortName = szLongPathName;
   }
   strShortName.ReleaseBuffer();
   int nPos = strShortName.ReverseFind('\\');
   if (nPos != -1)
     strShortName = strShortName.Right(strShortName.GetLength()- nPos-1);
   nPos = strShortName.ReverseFind('.');
   if (nPos != -1)
     strShortName = strShortName.Left(nPos);
   m_atomApp = ::GlobalAddAtom(strShortName);
   m_atomSystemTopic = ::GlobalAddAtom(_T("system"));

}