A Semaphore with a maximum count of 1 is functionally the same as a mutex (sometimes called a binary semaphore). Of course you can use a mutex instead, is this on Windows?

Nowhere in your post did you mention that a remote machine is involved. In that case a Mutex or Semaphore is not appropriate (I'm not so sure that file locking would be either). Other options include named pipes, but this then depends on the operating system.

In reply to Re^3: Need Advice on Folder/Drive locking by cdarke
in thread Need Advice on Folder/Drive locking by kuldeepchowhan

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