Is there a difference between creating a null pen with Create­Pen and just using the stock null pen?

Raymond ChenJanuary 27, 2020Jan 27, 202001/27/20

All null pens are functionally equivalent, so why have more than one? Are some pens more null than others?

Peeking inside C++/CX delegates

Raymond ChenJanuary 24, 2020Jan 24, 202001/24/20

If you ever have to debug one of these things.

Windows Runtime delegates and object lifetime in C++/CX, redux

Raymond ChenJanuary 23, 2020Jan 23, 202001/23/20

If you are the one calling the delegate, you have an extra thing to worry about.

Can shrinking a std::string throw an exception?

Raymond ChenJanuary 20, 2020Jan 20, 202001/20/20

It depends on how you shrink it.

How can I turn a structured exception into a C++ exception without having to use /EHa, if I can constrain exactly where the structured exception is coming from?

Raymond ChenJanuary 17, 2020Jan 17, 202001/17/20

Trying to contain the damage.

How can I handle both structured exceptions and C++ exceptions potentially coming from the same source?

Raymond ChenJanuary 16, 2020Jan 16, 202001/16/20

Call for a translator.

Why can’t I use SHSetKnownFolderPath to change the location of FOLDERID_LocalAppData?

Raymond ChenJanuary 15, 2020Jan 15, 202001/15/20

A acknowledgement of the reality that it not only doesn't work, but leaves the user profile corrupted.

Over-documenting TTM_RELAYEVENT and why it results in a one-second periodic timer running as long as the tooltip is visible

Raymond ChenJanuary 10, 2020Jan 10, 202001/10/20

Too much information leads to trouble.

Tree-walking algorithms: Incrementally performing an inorder walk of a binary tree

Raymond ChenJanuary 9, 2020Jan 9, 202001/9/20

We need to keep track of where we came from.

Tree-walking algorithms: Incrementally performing a postorder walk of an N-ary tree

Raymond ChenJanuary 8, 2020Jan 8, 202001/8/20

This time, we report on the way back up.