Showing tag results for Code

Daniel Chait wonders why we have both and . You know, I wonder the same thing. But I'm going to make an educated guess. Actually, most of what I write is just a lot of educated guessing. Like my explanation of why has such complicated rules? A guess. Why address space granularity is 64KB? A guess. Why most messages are in the system message...

When I discussed which message numbers belong to whom, you may have noticed that the messages for edit boxes, buttons, list boxes, combo boxes, scroll bars, and static controls go into the system range even though they are control-specific. How did those messages end up there? They didn't start out there. In 16-bit windows, these control-spec...

Let me get this out of the way up front: Creating a thread from is not recommended. The discussion here has to do with explaining the behavior you may observe if you violate this advice. Commenter Pete points out that "according to Usenet" creating a thread in is supposed to deadlock, but that's not what he saw. All he saw was that the thread ...

Here's a question that floated past some time ago: In my code, I have multiple objects that want to talk to the same handle (via ). Each time I create an object, I use to increment the reference count on the handle. That way, when each object calls , only the last one actually closes the handle. However, when I run the code, I find as soon as t...

Prerequisites: Basic understanding of assembly language. When you debug through some managed code at the assembly level, you may find that there are an awful lot of instructions scattered throughout your method. What are they doing there; isn't the JIT smart enough to remove them? Isn't this going to slow down execution of my program? It is my u...

When you debug through some managed code at the assembly level, you'll find a whole lot of seemingly pointless instructions that perform a comparison but ignore the result. What's the point of comparing two values if you don't care what the result is? In C++, invoking an instance method on a pointer results in undefined behavior. In other words, ...

One of the differences between C++ and C# is when static constructors run. In C++, static constructors are the first thing run in a module, even before the function runs.¹ In C#, however, static constructors don't run until you use the class for the first time. If your static constructor has side effects, you may find yourself experiencing ...

The C and C++ languages leave the order of evaluation generally unspecified aside from specific locations called sequence points. Side effects of operations performed prior to the sequence point are guaranteed visible to operations performed after it.¹ For example, the C comma operator introduces a sequence point. When you write f(), g(), the...

The primary monitor by definition has its upper left corner at (0, 0). Therefore, you can use this function: To make double extra sure (belt and suspenders), we also tell it, "If you're not sure what monitor to return, give us the primary." Sure, this sounds obviously simple, but I actually found somebody who fumbled around in the dark passi...

When you're installing your shell extension, you need to know which progid to hang it off of inside . We'll start with the title question and then move on to other predefined (but perhaps not well-known) progids.