A globally unique identifier, in Registry format, that identifies the task. This attribute is required if you use the -mof message compiler argument to generate a MOF class for downlevel support.
The symbol to use to reference the task in your application. The Message Compiler (MC.exe) uses the symbol to create a constant for the task in the header file that the compiler generates. If you do not specify a symbol, the compiler generates one for you.
A numeric value that uniquely identifies this task within the list of tasks that the provider defines. The value must be in the range from 1 through 239.
Examples
The following example shows how to specify a task.