How do I create task_handle object as member of the class ?

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MFC

In my Software i have a for loop which has very heavy process so i want to use parallel method such as mask_task to run this for loop in parallel .
i need to create array of task handle in Header file and then use them is Cpp file.
in MSDN the definition of make_task is local and the return value is 'auto' so i can not use the MSDN.

this command is now working in my software :

auto t1 = make_task([&]ParProcess(Input1,&Output1,&Output2);});

but i need to convert 't1' to the member of class and a pointer.
Is anyone can help me ?