Showing tag results for Code

Via the suggestion box, Martin Filteau asks Could you explain the implementation of WM_PRINTCLIENT? It seems that even MS got it wrong in the LISTBOX control. Try to AnimateWindow a window that as a LISTBOX control as a child. The LISTBOX displays correctly if it is NOT empty. However, if it is empty... nothing is drawn. I got a similar ...

Commenter Phil Quirk notes via the suggestion box, " is just a weird function. I guess it's easier to call than , but that's the only thing it seems to have going for it." Yup, that's about right. The function doesn't really do anything you couldn't already do yourself with . It's just a convenience function. And it you look at it pretty clos...

Commenter Phil Quirk asks via the suggestion box why the function lets you suppress repainting. "Shouldn't the OS be able to figure out if the window needs to be repainted?" Indeed the window manager does do a very nice job of figuring it out if you pass , which is the expected value of the parameter. But if you think you're smarter than the wi...

Commenter Phil Quirk asks why calling does not result in a message being sent to validate the moved window size. Well, because you moved it after all. You're being trusted to respect your own rules. After all, if you didn't want the window to be wider than 200 pixels, you shouldn't have passed , right? The message is for obtaining minimum ...

Classically speaking, a linker cannot rewrite the code the compiler generated; its job is merely to resolve symbols. Of course, resolving symbols means that references to those symbols in the code generated by the compiler turn from "I don't know" to "Here it is." Somebody named George appeared to be confused by this, believing that all changes by...

Do and include cycles spent in kernel mode? Yes, they do. They count cycles spent both in user mode and in kernel mode.

Commenter Francisco Moraes wonders whether there is a supported way of getting the command line of another process. Although there are certainly unsupported ways of doing it or ways that work with the assistance of a debugger, there's nothing that is supported for programmatic access to another process's command line, at least nothing provided b...

This is the blog entry that acted as the inspiration for the last topic in my 200 PDC talk. When somebody launches a second copy of your single-instance program, you usually want the second copy to send its command line to the first instance (and deal with the current directory somehow), and then you want the first instance to come to the foreg...

There are any number of bits of information you might want to query from the file system, such as the number of files in a directory or the total size of the files in a directory. Why doesn't the file system keep track of these things? Well, of course, one answer is that it certainly couldn't keep track of every possible fragment of information ...

This is sort of an extreme corollary to Don't save anything you can recalculate. Sure, it sounds like such an obvious principle, but many people fail to understand its consequences. Let's look at the principle again. Don't keep track of information you don't need. I remember being asked to look at a customer's program, and one thing that struck...