CreateFile2 function

【外部リンク】
https://msdn.microsoft.com/en-us/library/windows/desktop/hh449422(v=vs.85).aspx
Value Meaning
0
0x00000000
Prevents other processes from opening a file or device if they request delete, read, or write access. Exclusive access to a file or directory is only granted if the application has write access to the file.

FILE_SHARE_DELETE
0x00000004
Enables subsequent open operations on a file or device to request delete access.

Otherwise, other processes cannot open the file or device if they request delete access.

If this flag is not specified, but the file or device has been opened for delete access, the function fails.

Note  Delete access allows both delete and rename operations.

FILE_SHARE_READ
0x00000001
Enables subsequent open operations on a file or device to request read access.

Otherwise, other processes cannot open the file or device if they request read access.

If this flag is not specified, but the file or device has been opened for read access, the function fails.

If a file or directory is being opened and this flag is not specified, and the caller does not have write access to the file or directory, the function fails.

FILE_SHARE_WRITE
0x00000002
Enables subsequent open operations on a file or device to request write access.

Otherwise, other processes cannot open the file or device if they request write access.

If this flag is not specified, but the file or device has been opened for write access or has a file mapping with write access, the function fails.