Developing Drivers with the Windows® Driver Foundation

Trace Message Functions and Macros

The core of any tracing implementation is the function that generates the trace message itself. You insert a trace message function in the code at appropriate points and then configure the function to place useful information into the message. The generated message can include any information that is useful, typically some literal text to define the message context plus the values of any interesting variables. WPP trace messages can be generated in three primary ways:

• By using the default DoTraceMessage macro.

  The WPP preprocessor converts DoTraceMessage into the appropriate ETW function call. The ETW function varies depending on the version of Windows for which the driver is compiled and whether the driver runs ...