What is a thread exit code

Question

What exactly is a thread exit code in the Output window while debugging  What information it gives me  Is it somehow useful or just an internal stuff which should not bother me   The thread 0x552c has exited with code 259  0x103   The thread 0x4440 has exited with code 0  0x0     Is there maybe some sort of list of possible exit codes along with its significance

User · Answer

what happened to me is that I have multiple projects in my solution  I meant to debug project 1  however  the project 2 was set as the default starting project  I fixed this by  right click on the project and select  Set as startup project   then running debugging is fine

User · Answer

As Sayse mentioned  exit code 259  0x103  has special meaning  in this case the process being debugged is still running   I saw this a lot with debugging web services  because the thread continues to run after executing each web service call  as it is still listening for further calls

User · Answer

There actually doesn t seem to be a lot of explanation on this subject apparently but the exit codes are supposed to be used to give an indication on how the thread exited  0 tends to mean that it exited safely whilst anything else tends to mean it didn t exit as expected  But then this exit code can be set in code by yourself to completely overlook this   The closest link I could find to be useful for more information is this  Quote from above link      What ever the method of exiting  the integer that you return from your process or thread must be values from 0-255 8bits    A zero value indicates success  while a non zero value indicates failure   Although  you can attempt to return any integer value as an exit code  only the lowest byte of the integer is returned from your process or thread as part of an exit code   The higher order bytes are used by the operating system to convey special information about the process   The exit code is very useful in batch shell programs which conditionally execute other programs depending on the success or failure of one      From the Documentation for GetEXitCodeThread     Important  The GetExitCodeThread function returns a valid error code defined by the application only after the thread terminates  Therefore  an application should not use STILL ACTIVE  259  as an error code  If a thread returns STILL ACTIVE  259  as an error code  applications that test for this value could interpret it to mean that the thread is still running and continue to test for the completion of the thread after the thread has terminated  which could put the application into an infinite loop      My understanding of all this is that the exit code doesn t matter all that much if you are using threads within your own application for your own application  The exception to this is possibly if you are running a couple of threads at the same time that have a dependency on each other  If there is a requirement for an outside source to read this error code  then you can set it to let other applications know the status of your thread

[c#] What is a thread exit code?

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