The method of moving.
Specifies a location in the file from where the ib to move the read/write
pointer starts. The values and their meanings are described in the following
list:
- FILE_BEGIN
Move the pointer from the beginning of the file.
- FILE_CURRENT
Move the pointer from the current location of the read/write pointer.
- FILE_END
Move the pointer from the end of the file. Use this method to determine
a file's size.