Showing tag results for Code

A customer was creating a large file and found that, even though the file was opened with and the call was being made with an structure, the I/O was nevertheless completing synchronously. Knowledge Base article 156932 covers some cases in which asynchronous I/O will be converted to synchronous I/O. And in this case, it was scenario number thre...

A customer found that a single-byte write was taking several seconds, even though the write was to a file on the local hard drive that was fully spun-up. Here's the pseudocode: The customer experimented with using asynchronous I/O, but it didn't help. The write still took a long time. Even using (and writing full sectors, naturally) didn't he...

Commenter Nice Clipboard Manager (with drop->clipboard) wonders why Windows still uses a linked list to inform programs about clipboard modifications. If any clipboard viewer fails to maintain the chain, then some windows won't get informed of the change, and if a clipboard viewer creates a loop in the chain, an infinite loop results. Well, ...

After receiving the explanation of what happens to a sent message when reaches its timeout, a customer found that the explanation raised another question: If the window manager waits until the receiving thread finishes processing the message, then why can't you post a message? "After all, with a very short timeout isn't all that different from ...

The function tries to send a message, but gives up if the timeout elapses. What exactly happens when the timeout elapses? It depends. The first case is if the receiving thread never received the message at all. (I.e., if during the period the sender is waiting, the receiving thread never called , , or a similar message-retrieval function which d...

Mark complained that a common control for associating extensions is well overdue. This is a recurring theme I see in the comments: People complaining that Windows lacks some critical feature that it in fact already has. (In the case, Windows had the feature for over two years at the time the question was asked. Maybe the SDK needs a ribbon? j/k) ...

Somebody sent me email pointing out strange behavior in the function if you fail a window creation by returning −1 from the message. On the other hand, returning from seems to work just fine. "So why the difference with ?" You already know enough to solve this puzzle. You just need to connect the dots. (In fact, the person who sent ...

Our old friend, the IContextMenu.

Last time, we wrote a simple program to print various properties of the items in the Recycle Bin, and we did so in the classical style, using item ID lists and s. One thing you may have noticed is that a lot of functions take the combination of an and a . In the shell namespace, operations on items usually happen by means of the pair (folder, ch...

For some reason, a lot of people are interested in programmatic access to the contents of the Recycle Bin. They never explain why they care, so it's possible that they are looking at their problem the wrong way. For example, one reason for asking, "How do I purge an item from the Recycle Bin given a path?" is that some operation in their program...