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Entering critical section and context switching in C ++

I am new to thread programming (currently I need to use win32 and C ++ in a company project) and I just want to ask if the entry is in the critical section without context switching? Does this mean that the thread blocks resources until it leaves the critical section?

Also, I am currently reading the book "Multithreaded Applications in Win32" and it seems good, but is there a more readable and more modern book for beginners to learn about threads in win32?

Thanks a lot in advance ^ _ ^

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