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Category Archives: MFC
_DllMain@12 already defined
We recently faced this linkage error: error LNK2005: _DllMain@12 already defined in MSVCRT.lib(dllmain.obj) Searching gives ~36K results as of July 2012, many of which seem high quality (StackOverflow, MS, CodeProject etc.), and I was certain it would be a simple … Continue reading
Posted in Debugging, MFC
6 Comments
On AFX_MODULE_STATE, Appendix
My recent AFX_MODULE_STATE plunge was driven by some real world problems. In parallel to the write-up I mailed the current MFC chief maintainer, Pat Brenner – who directly invited such user interaction. The correspondence that ensued makes semi-official claims that … Continue reading
Posted in MFC
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On AFX_MODULE_STATE, or – Avoiding afxCurrentInstanceHandle Asserts, Part 2
(Part 1.) The AFX_MANAGE_STATE macro is an iceberg-tip of some heavy machinery, whose documentation leaves much to be desired. Here’s an attempt to fill in some more blanks. Mid-Depth Dive Answering a question raised at part 1, the basic statement … Continue reading
Posted in MFC
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On AFX_MODULE_STATE, or – Avoiding afxCurrentInstanceHandle Asserts, Part 1
All too often I see one of these asserts fire: These are coded in afxwin1.inl, and are part of the MFC high level accessors: If these asserts fire for you too, there’s a good chance you’re missing some afx module … Continue reading
Posted in MFC
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Three F-keys Gotchas
We recently did a small internal app, that had to use all 12 F-keys – which turned out to be surprisingly cumbersome. I hadn’t found this stuff concentrated on a single place, and certainly it could have saved me some … Continue reading
Posted in MFC, Win32
4 Comments
AfxIsValidAddress (and Others) Don’t Work as Advertised
MFC exposes a some memory debugging facilities such as AfxIsValidAddress, which (for debug builds) supposedly – Tests any memory address to ensure that it is contained entirely within the program’s memory space. Or does it? AfxIsValidAddress only delegates the call … Continue reading
Posted in MFC, Win32
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Ofek's Visual C++ stuff 