If you've been scouting around the Programmer's Reference of the Windows Software Development Kit, you may be wondering why the Windows GetCurrentTime function is not used in DIGCLOCK. The answer is that GetCurrentTime tells you about ”Windows time“ rather than real time. This is the time (in milliseconds) since the beginning of the current Windows session. GetCurrentTime is used mostly for calculating a difference from the time returned from GetMessageTime. You can use these two calls while processing a message to determine how long the message was in the message queue before you retrieved it for processing.