CFile::Seek
virtualLONGSeek(LONGlOff**,UINTnFrom);**
throw(CFileException);
Return Value
If the requested position is legal, Seek returns the new byte offset from the beginning of the file. Otherwise, the return value is undefined and a CFileException object is thrown.
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.
Remarks
Repositions the pointer in a previously opened file. The Seek function permits random access to a file’s contents by moving the pointer a specified amount, absolutely or relatively. No data is actually read during the seek.
When a file is opened, the file pointer is positioned at offset 0, the beginning of the file.
Example
//example for CFile::Seek
extern CFile cfile;
LONG lOffset = 1000, lActual;
lActual = cfile.Seek( lOffset, CFile::begin );