lpName [in] Long pointer to a null-terminated string specifying the name of the mutex object. The name is limited to MAX_PATH characters and can contain any character except the backslash path-separator character (\). Name comparison is case sensitive. If lpName matches the name of an existing named mutex object, the bInitialOwner parameter is ignored because it has already been set by the creation process.
If lpName is NULL, the mutex object is created without a name.
If lpName matches the name of an existing event, semaphore, or file-mapping object, the function fails and the GetLastError function returns ERROR_INVALID_HANDLE. This occurs because these objects share the same name space.
