pszName (PSZ) - input
Semaphore names are validated by the file system, and must include the prefix \SEM32\. A maximum of 255 characters is allowed. If these requirements are not met, ERROR_INVALID_NAME is returned. If the semaphore already exists, ERROR_DUPLICATE_NAME is returned.
If this field is null, the semaphore is unnamed. Unnamed mutex semaphores can be either private or shared, depending on flAttr They are identified by the semaphore handle that phmtx points to.
By default, named semaphores are shared.