The Old New Thing

How WRL squeezes a weak reference and a reference count into a single integer

August 17, 2020 Aug 17, 2020 08/17/20

Raymond Chen

It's basically a union of a pointer and an integer.

The case of Explorer calling into an unloaded DLL while trying to run down a reference to it

August 14, 2020 Aug 14, 2020 08/14/20

Raymond Chen

Let's do some debugging.

Working around the requirement that Concurrency Runtime task results must be default-constructible and copyable

August 13, 2020 Aug 13, 2020 08/13/20

Raymond Chen

Applying tricks to avoid the pitfalls.

Hidden constraints on the result type in Concurrency Runtime tasks

August 12, 2020 Aug 12, 2020 08/12/20

Raymond Chen

If you are using the Concurrency Runtime task<T> to represent asynchronous activity, there are some hidden constraints on the type T. If you violate these constraints, the compiler will complain, but perhaps not in an obvious way.¹ If you try to create a task<T> where T does not have a public default constructor, then you get an...

How can I tell whether the user has disabled toast notifications for my app?

August 10, 2020 Aug 10, 2020 08/10/20

Raymond Chen

The ToastNotifier settings will tell you.

How do I make my accelerators apply only when used in the main window and not when the user is using a modeless dialog?

August 7, 2020 Aug 7, 2020 08/7/20

Raymond Chen

Sometimes you feel like an accelerator table, sometimes you don't.

How can CharUpper and CharLower guarantee that the uppercase version of a string is the same length as the lowercase version?

August 4, 2020 Aug 4, 2020 08/4/20

Raymond Chen

Does it have a special under-the-table deal with the Unicode Consortium?