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Application Debugging? (Threads)

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The Question is:

 
Hi Mr. Wizard,
 
I have a multithread app written in C++. Randomly, one of the thread got hang
 and I don't know how to set focus to that thread to see what is happening and
 where does it hang. Would you like to show me how to run debugger and set
 focus to the suspicous th
read.
 
Thanks,
Thien

The Answer is :

 
  Please see topics such as (1661), and please seriously consider the
  implementation of application-integrated debugging support -- this
  is user-written debugging code implemented directly within the
  application, and code that will specifically assist in debugging
  the application.  Examples include activity logging tools, ring
  buffers, log files, and counters.
 

  
     
     answer written or last revised on ( 6-AUG-2001 )
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