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Example 3: Typical Start Command

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The following command format is typically used to start a trace session:

tracelog -start MyTrace -guid MyProvider.guid -f d:\traces\testtrace.etl -flag 2 -level 0xFFFF

The command starts a trace session named "MyTrace".

It uses the -guid parameter to indicate the MyProvider.guid file, a simple text file that contains nothing but the provider's control GUID. You can also use a control GUID file, such as Tracedrv.ctl, with the -guid parameter. Tracedrv.ctl is included in the TraceDrv sample.

The command includes the -f parameter to specify the name and location of the event trace log file. It includes the -flag parameter to specify the flags set and the -level parameter to specify the level setting. You can omit these parameters, but some trace providers do not generate any trace messages unless you set the flag or the level.