Showing tag results for Code

Sometimes people think they can switch stacks by just loading a new value into the register. This may seem to work but in fact it doesn't, because there is more to switching stacks than just loading a new value into . On the x86, the exception chain is threaded through the stack, and the exception dispatch code verifies that the exception chain...

This is one of those things that is obvious to me, but perhaps is not obvious to everyone. An object establishes what can be done with it. Any rights granted by the object go to the creator. The creator can in turn grant rights to others. But if you're a third party to the object/creator relationship, you can't just step in and start messing around...

As I noted earlier, when you create a forwarder entry in an export table, the corresponding target DLL is not loaded until somebody links to the forwarder entry. It looks like some people misread this statement to suggest some sort of delay-loading so I'm going to state it again with an example in mind in the hopes of clearing up any confusion (...

The message is sent early in the window state changing process, unlike , which tells you about what already happened. A crucial difference (aside from the timing) is that you can influence the state change by handling the message and modifying the structure. Here's an example that prevents the window from being resized. Before the message...

The documentation for the message points out that the message is not sent under certain circumstances. But what if you want to know when the window is shown, including in the cases where you don't get ? The message is sent at the end of the window state change process. It sort of combines the other state change notifications, , , and . But it ...

Even though I'm signed in, the page claims that anonymous comments are not allowed, so I'm reduced to posting my comment here and generating a trackback. Some time ago, Robert McLaws wrote a function that generates initials from a name. Let's set aside completely the issue of non-U.S. names; the function doesn't even handle U.S. names correctly. ...

Nowadays, a hard drive less than 20 gigabytes is laughably small, but it used to be that the capacity of a hard drive was measured in megabytes, not gigabytes. Today, video files and databases can run to multiple gigabytes in size, and your programs need be prepared for them. This means that you need to use 64-bit file offsets such as those used b...

Commenter Matt asks how you're supposed to handle failures in functions like or . Obviously, you can't. If a clean-up function fails, there's not much you can do because, well, how do you clean up from a failed clean-up? These clean-up functions fall into the category of "Must not fail for reasons beyond the program's control." If a program trie...

When you call the function, you can pass the flag to indicate that the change is temporary. But if you don't also save the changes in the registry, how can they be permanent? What does temporary mean? A temporary display change is one that your program has entered because it has gone into a fullscreen mode, a change which it will undo when it re...

The following request for assistance came in from a customer, and given what you know about window destruction, you should eventually be able to figure it out yourself once all the pieces are in place, though it takes some time for all the clues to be revealed. We are hitting this exception in our program. This is urgent; please give it priorit...