Showing tag results for Code

A customer reported an incompatibility in Windows 7: If A: is a floppy drive and they call and there is no disk in the drive, the call fails with the error . Previous versions of Windows failed with the error . Both error codes are reasonable responses to the situation. "The module couldn't be found because the drive is not ready." Programs...

A customer designed a system which uses shared memory. Specifically, for each database file, they create a corresponding shared memory block of, say, 200MB. Multiple clients which connect to the same database file use the same shared memory block. Naturally, if two processes each access the same database file, each process will map the shared memor...

A while back, I linked to a talk by Silviu Calinoiu on the fault-tolerant heap. But what if you don't want the fault-tolerant heap? For example, during program development, you probably want to disable the fault-tolerant heap for your program: If the program is crashing, then it should crash so you can debug it! Method 1 is to disable the ...

Friday asks whether OANOCACHE can be used for non-debug purposes, say to improve stability and/or speed. You can try, but it's not recommended. For one thing, it probably damages stability, because there are many applications out there which unwittingly rely on the BSTR cache to protect them from heap corruption bugs. The Windows team has for yea...

Exclusively sequential, nonsequential, and then there's sort-of-sequential.

I have an ongoing conflict with my in-laws. Their concept of the correct amount of food to have in the refrigerator is "more than will comfortably fit." Whenever they come to visit (which is quite often), they make sure to bring enough food so that my refrigerator bursts at the seams, with vegetables and eggs and other foodstuffs crammed into every...

Commenter Worf remarked, "My one wish is that would be supported." I always find it interesting when people say "I wish that Microsoft would stop following standards," since the directive is nonstandard. The Microsoft C/C++ compiler implements the feature in a method compatible with the standard, namely via a directive. If you want ...

A customer reported that they were receiving some assertion failures because the function was failing with what they believed to be a valid heap block, and the function reported that the reason for failure was . What's going on? One of my colleagues asked the psychic question, "Is the process exiting?" "Why yes, in fact it is. How did you know?...

When the function receives a reason code of , the increasingly-inaccurately-named parameter to is used to indicate whether the process is exiting. And if the process is exiting, then you should just return without doing anything. No, really. Don't worry about freeing memory; it will all go away when the process address space is destroyed. Don...

Last week we looked at menu drag/drop. Another little-used menu feature added in Windows 2000 is the ability to show context menus on menus. The message is and the flag is . Let's demonstrate with a simple program. Start with the scratch program, and add the function just so our context menu can do something. When we receive the me...