1.00 1.50 1.51 1.52
WINDOWS
kbprg kbbuglist
----------------------------------------------------------------------
The information in this article applies to:
- The Microsoft Foundation Classes (MFC), included with:
Microsoft Visual C++ for Windows, version 1.0, 1.5, 1.51 and 1.52
----------------------------------------------------------------------
SYMPTOMS
========
With version 2.0 of the Microsoft Foundation Classes (MFC), the size of the
buffer used by CMemFile and classes derived from CMemFile is limited to
64K.
CAUSE
=====
Although the memory for the file is allocated using GlobalAlloc and is
allowed to grow, the member variable that contains the buffer size is of
type UINT, limiting the total file size to 64K.
RESOLUTION
==========
Although internal use of CMemFile and CMemFile-derived classes cannot be
changed without modifying the MFC sources, the user may derive a class from
CMemFile and create memory allocation functions and a member variable for a
buffer size with a higher limit.
STATUS
======
Microsoft has confirmed this to be a bug in the Microsoft products
listed at the beginning of this article. We are researching this bug
and will post new information here in the Microsoft Knowledge Base as
it becomes available.
Additional reference words: 1.00 1.50 2.00 2.50 in-memory RAM
KBCategory: kbprg kbbuglist
KBSubcategory: MfcFileIO
Keywords : kb16bitonly
Issue type :
Technology : kbAudDeveloper kbMFC