The Old New Thing

Paint messages will come in as fast as you let them

December 19, 2011 Dec 19, 2011 12/19/11

Raymond Chen

There is a class of messages which are generated on demand rather than explicitly posted into a message queue. If you call or and the queue is empty, then the window manager will look to see if one of these generated-on-demand messages is due, messages like , , and . Neil wonders, "In that program that called 100,000 times, how many paint ...