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    The Old New Thing

    March 2013 | The Old New Thing

    2013 Q1 link clearance: Microsoft blogger edition
    2013 Q1 link clearance: Microsoft blogger edition
    Raymond ChenRaymond ChenMarch 29, 2013Mar 29, 201303/29/13
    It's that time again: Linking to other Microsoft bloggers...

    Comments are closed.0Other
    How do I convert a method name to a method index for the purpose of INTERFACEINFO?
    How do I convert a method name to a method index for the purpose of INTERFACEINFO?
    Raymond ChenRaymond ChenMarch 29, 2013Mar 29, 201303/29/13
    The IMessage­Filter::Handle­Incoming­Call method describes the incoming call by means of an INTERFACE­INFO structure: typedef struct tagINTERFACEINFO { LPUNKNOWN pUnk; IID iid; WORD wMethod; } INTERFACEINFO, *LPINTERFACEINFO; The wMethod is a zero-based index of the method within the interface. For example, ...

    Comments are closed.0Code
    The C language specification describes an abstract computer, not a real one
    The C language specification describes an abstract computer, not a real one
    Raymond ChenRaymond ChenMarch 28, 2013Mar 28, 201303/28/13
    If a null pointer is zero, how do you access the memory whose address is zero? And if C allows you to take the address one past the end of an array, how do you make an array that ends at 0xFFFFFFFF, since adding one to that value would wrap around? First of all, who says that there is a byte zero? Or a byte 0xFFFFFFFF? The C language does...

    Comments are closed.0Other
    “Adjust visual effects for best performance” should really be called “Adjust visual effects for crappiest appearance”
    “Adjust visual effects for best performance” should really be called “Adjust visual effects for crappiest appearance”
    Raymond ChenRaymond ChenMarch 27, 2013Mar 27, 201303/27/13
    In the Performance Options control panel, on the tab labeled Visual Effects, there is a radio button called Adjust for best performance. If you select it, then all the visual effects are disabled. But the name of that radio button has been wrong for a long time. It doesn't actually adjust your visual effects for best performance. It just ...

    Comments are closed.0Tips/Support
    There’s no law that says two people can’t have the same thing to eat
    There’s no law that says two people can’t have the same thing to eat
    Raymond ChenRaymond ChenMarch 26, 2013Mar 26, 201303/26/13
    Some time ago, my group went out for a team lunch. It was to a restaurant we were not familiar with, so there was quite a bit of time studying the menu. As everybody looked over the menu, discussion naturally turned to "So what are you going to have?" "I think I'll have the salmon sandwich." One of my colleagues replied, "Oh, rats. I was ...

    Comments are closed.0Non-Computer
    Dreaming about a rather unusual guitar rehearsal
    Dreaming about a rather unusual guitar rehearsal
    Raymond ChenRaymond ChenMarch 25, 2013Mar 25, 201303/25/13
    I dreamed that I watched a long-time colleague of mine rehearse the guitar in preparation for the new "hot pants" competition of the Miss Universe pageant. The scary thing is that the pageant may actually do it...

    Comments are closed.0DreamNon-Computer
    Using accessibility to monitor windows as they come and go
    Using accessibility to monitor windows as they come and go
    Raymond ChenRaymond ChenMarch 25, 2013Mar 25, 201303/25/13
    Today's Little Program monitors windows as they come and go. When people contemplate doing this, they come up with ideas like installing a WH_CBT hook or a WH_SHELL hook, but one of the major problems with those types of hooks is that they are injected hooks. Injection is bad for a number of reasons. It forces the hook to be in a DLL so it ...

    Comments are closed.0Code
    When will GetMessage return -1?
    When will GetMessage return -1?
    Raymond ChenRaymond ChenMarch 22, 2013Mar 22, 201303/22/13
    A source of great consternation is the mysterious -1 return value from Get­Message: If there is an error, the return value is −1. For example, the function fails if hWnd is an invalid window handle or lpMsg is an invalid pointer. That paragraph has caused all sorts of havoc, because it throws into disarray the standard message pump: ...

    Comments are closed.0Code
    Does this operation work when file system redirection is disabled? The default answer is NO
    Does this operation work when file system redirection is disabled? The default answer is NO
    Raymond ChenRaymond ChenMarch 21, 2013Mar 21, 201303/21/13
    A customer reported that when their program called SH­Get­File­Info to get the icon for a folder, the call failed. "It works on some machines but not others. We don't know what the difference is between the working and non-working machines." They included the offending function from their program, but everything in the function ...

    Comments are closed.0Code
    The x86 architecture is the weirdo: Structured exception handling
    The x86 architecture is the weirdo: Structured exception handling
    Raymond ChenRaymond ChenMarch 20, 2013Mar 20, 201303/20/13
    If your reference architecture is x86, then you will think that everything it does is normal and the rest of the world is weird. Except it's the other way around: The x86 architecture is the weirdo. I was reminded of this when commenter 640k complained, on the subject of what I think is table-based structured exception handling, "It would ...

    Comments are closed.0Other
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