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Occasionally, I'll see people having trouble trying to for functions like or . Usually, it's coming from people who are trying to write p/invoke signatures, for p/invoke does a under the covers. Why can't you for these functions? Because they're not really functions. They're function-like macros: In fact, as you can see above is doubly a...

The documentation for the function states that the first parameter is a "pointer to the buffer containing the version-information resource returned by the function." Some people, however, decide to bypass this step and pass a pointer to data that was obtained some other way, and then wonder why doesn't work. The documentation says that the fir...

Different functions call it different things. calls it . calls it reference data. calls it . just calls it a parameter! But whatever its name is, it means the same thing: It's a value the function doesn't care about. All the function does is hand that value back to you. What the value means is up to you. What if you need to pass more context ...

Jesse Kaplan, one of the CLR program managers, explains why you shouldn't write in-process shell extensions in managed code. The short version is that doing so introduces a CLR version dependency which may conflict with the CLR version expected by the host process. Remember that shell extensions are injected into all processes that use the shell ...

It has its ups and downs.

When the listview control asks you for an infotip, it sends you then notification, and when you return, the result is displayed as the infotip. But what if computing the infotip takes a long time? You don't want to stall the UI thread on a long operation, after all. This is where comes in. If you want to say, "Um, I'm not ready with that infot...

When displaying infotips for listview items, you have to deal with both the folded and unfolded case. "Folded" is the term used to describe a listview item in large icon mode whose text has been truncated due to length. When the user selects the item, the full text is revealed, a process known as "unfolding". Take our scratch program and make t...

Nobody can make any progress because they keep getting stuck.

One of the more subtle ways people mess up is returning when the problem wasn't actually an unsupported interface. The return value has very specific meaning. Do not use it as your generic "gosh, something went wrong" error. (Use an appropriate error such as or .) Recall that the rules for are that (in the absence of catastrophic errors such...

Although the function is documented in the Platform SDK, it's not really part of the platform. Rather, is the conventional name for the user-provided entry point to a Windows program. The real entry point is in the C runtime library, which initializes the runtime, runs global constructors, and then calls your function (or if you prefer a...