Parameters
lOff
Number of bytes to move the pointer.
nFrom
Pointer movement mode. Must be one of the following values:
CFile::begin: Move the file pointer lOff bytes forward from the beginning of the file.
CFile::current: Move the file pointer lOff bytes from the current position in the file.
CFile::end: Move the file pointer lOff bytes from the end of the file. Note that lOff must be negative to seek into the existing file; positive values will seek past the end of the file.