The Old New Thing

When I create a waitable timer with a callback, do I have to wait alertably on that specific timer before the callback will run?

December 30, 2022 Dec 30, 2022 12/30/22

Raymond Chen

Any alertable wait will do.

How can I detect programmatically whether Windows is an N or KN version?

December 29, 2022 Dec 29, 2022 12/29/22

Raymond Chen

Don't check the version, just check the feature.

After importing a TLB, how do I convert from one type of _com_ptr_t to another?

December 28, 2022 Dec 28, 2022 12/28/22

Raymond Chen

Digging into the source code.

The case of the recursively hung WM_DRAW­CLIPBOARD message

December 23, 2022 Dec 23, 2022 12/23/22

Raymond Chen

Understanding why it's happening and how you can avoid it.

Is there a fixed virtual address that the system promises never to use for anything, so I can use it?

December 22, 2022 Dec 22, 2022 12/22/22

Raymond Chen

Everything is up for grabs.

Running some UI code on a timer at a higher priority than your usual timer messages, or without coalescing

December 21, 2022 Dec 21, 2022 12/21/22

Raymond Chen

You can build your own timer system.