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Here's a problem that floated past a few years ago. We switched our wizard from using dialog resource IDs to using because [reasons deleted since they aren't important]. But once we did that, the Next button doesn't work! Anybody have any ideas what's going on? I made things a little easier by deleting the information that isn't relevant to the...

It depends on what you mean by default. As we saw earlier, the convention for Windows header files is that if you don't specify a particular version, then you get the most recent version. The shell common controls header file follows this convention, so if you include the Windows XP version of , you get functions, messages, and structures de...

Okay, so there are all these different ways you can specify what version of the Windows header files you want.† Let's take them in order. The symbol is the earliest one. That's the symbol that 16-bit Windows used to control the versioning of its header files, and its use carried forward into the 32-bit header files, presumably from t...

The general rule with Windows header files is that if you don't specify which version of the header file you want, you get the latest version. For example, if you have the Windows XP Platform SDK header files and you , you're going to get the Windows XP function prototypes, the Windows XP structures, the the Windows XP flags, a...

Commenter Gareth asked why, when the system metrics change and the taskbar changes size to match, the taskbar doesn't return to its original size when the metrics return to their previous values. Because the taskbar doesn't remember the path of changes that led to its current state. It just knows its current state. Let's say the taskbar is 30 pi...

Here's a question that floated past my field of view some time ago: When the mouse hovers over a disabled window, the tooltip associated with that window does not appear. Why is this? Why isn't this documented in MSDN? Actually, you already know the answer, and it is documented. You just have to connect the dots. When a window is disabled, it d...

Because one thread is all it needs.

The function takes a pointer to a buffer () and a size (), and that size is the size of the buffer, in bytes. No really, that's what it is. The application compatibility folks found one popular game which wasn't quite sure what that parameter meant. The programmers must have thought it meant "The size of the version resources you want to loa...

Commenter Mike Petry asked via the Suggestion Box: Why can you dereference a COM interface pointer and pass it to a function with a Com interface reference. The call. The function called. I found some code written like this during a code review. It is wrong but it seems to work. You already know the answer to this question. You mere...

Here's a problem "inspired by actual events": I have a sequential stream that is the response to a request I sent to a web site. The format of the stream is rather messy; it comes with a variable-length header that describes what type of data is being returned. I want to read that header and then hand the stream to an appropriate handler. But t...