The Old New Thing

The C++ implicit assignment operator is a non-ref-qualified member, even if the base class’s assignment has a ref-qualifier

Raymond Chen September 16, 2021 Sep 16, 2021 09/16/21

Does that count as dis-qualification?

How do I set the alpha channel of a GDI bitmap to 255?

Raymond Chen September 15, 2021 Sep 15, 2021 09/15/21

Most things destroy the alpha channel, but there's a way to bring it back, or at least make it opaque.

Microspeak: Persona

Raymond Chen September 14, 2021 Sep 14, 2021 09/14/21

A template for a prototypical user.

The C++/WinRT query_interface_tearoff extension point, and using it for COM aggregation

Raymond Chen September 13, 2021 Sep 13, 2021 09/13/21

For adding your own QueryInterface magic.

Ordering asynchronous updates with coroutines, part 5: Bowing out via cancellation

Raymond Chen September 10, 2021 Sep 10, 2021 09/10/21

Using the built-in way of stopping a coroutine.

Ordering asynchronous updates with coroutines, part 4: Bowing out, explicit version

Raymond Chen September 9, 2021 Sep 9, 2021 09/9/21

Realizing you're not the one.

Ordering asynchronous updates with coroutines, part 3: Let them all compete, but only one wins

Raymond Chen September 8, 2021 Sep 8, 2021 09/8/21

Everybody tries, but only one wins.

Ordering asynchronous updates with coroutines, part 2: Restart with hand-off

Raymond Chen September 7, 2021 Sep 7, 2021 09/7/21

Everybody just waits their turn.

Ordering asynchronous updates with coroutines, part 1: Mutual exclusion

Raymond Chen September 6, 2021 Sep 6, 2021 09/6/21

Everybody just waits their turn.

I declared my Windows Runtime method as accepting an array by reference, but it always arrives empty

Raymond Chen September 3, 2021 Sep 3, 2021 09/3/21

You were never meant to put things into the box, not look at what was already there.