Showing tag results for Code

Commenter BryanK wonders why weird things happen if you destroy a window while it is processing the message. He suspects that it's similar to the problems you encounter when you destroy a window in response to the message. Although I haven't studied the situation, I wouldn't be surprised if the problem is indeed entirely analogous. It just f...

This is another trick along the lines of using DIB sections to perform bulk color mapping. GDI will do it for you; you just have to know how to ask. Today's mission is to take a 4bpp bitmap and compress it in BI_RLE4 format. Now, sure, there are programs out there which already do this conversion, but the lesson is in the journey, not in the dest...

Commenter Frans Bouma asks, Why is the text of a treenode chopped off when you switch the font from normal to bold? It apparently is for backwards compatibility but I fail to see why this is necessary for backward compatibility... Actually, bold treeview items work just fine. Watch: Start with our scratch program and make these changes: ...

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...