Showing tag results for Code

A customer wrote a program that calls to extend the frame over the entire client area, but then discovered that this made programming difficult: I have a window which I want to have a glassy border but an opaque body. I made my entire window transparent by calling , and I understand that this means that I am now responsible for managing the alpha...

A customer reported that their program was failing to start up because the call to was taking a long time and then eventually returning with . The account that was experiencing this problem had a redirected network profile, "but even if he's redirecting, why would we get the bad net path error? Does calling actually touch the folder/network? If s...

There's and then there's . What makes more real? Recall from last time that the functions were added to support Windows accessibility. The goal with is to help accessibility tools identify what kind of window it is working with, even if the application did a little disguising in the form of superclassing. If you ask for the class name o...

Oh wait, there's also . There are many ways of identifying the window that appears beneath a point. The documentation for each one describes how they work, but I figured I'd do a little compare/contrast to help you decide which one you want for your particular programming problem. The oldest functions are and . The primary difference between the...

A customer reported the following strange problem: I tried to copy some text files from my computer to another computer on the network. After the copy completes, I looked at the network directory and found that while it did contain files with the same names as the ones I copied, they have completely wrong timestamps. Curious, I opened up the file...

A customer ran into a crashing bug in their shell extension. The shell extension wants to change the thread's preferred UI language temporarily, so that it can load its resources from a specific language. You'd think this would be easy: Approximately ten seconds after this code runs, Explorer crashes with the exception whose description is "A ...

Although the Microsoft C compiler supports a calling convention called , that's just what the calling convention is called; its relationship with the FORTRAN programming language is only coincidental. The keyword is now just an old-fashioned synonym for . Various FORTRAN compilers use different calling conventions; the one I describe here appli...

Michal Zygmunt wants to create a system where multiple applications can have focus, with different users generating input and directing them at their target applications. Attempting to simulate this by posting input messages didn't work. "Can you tell us maybe how SendInput is internally implemented so that we can use it to simulate only part of...

You can take advantage of the fact that the associated with asynchronous I/O is passed by address, but there was some confusion about how this technique could "work" when kernel mode has no idea that you are playing this trick. Whether kernel mode is in on the trick is immaterial since it is not part of the trick. Let's start with a version ...

When you issue asynchronous I/O, the completion function or the I/O completion port receives, among other things, a pointer to the structure that the I/O was originally issued against. And that is your key to golden riches. If you need to associate information with the I/O operation, there's no obvious place to put it, so some people end up doi...