Low-Level File Functions

These functions make it possible for you to manipulate files and communication ports at a low level. Low-level file functions should be used carefully, especially when manipulating table files. Before using these functions, test them on sample files before using them on files that contain important data.

Use	To
FCHSIZE( ) Function	Change the size of a file opened with a low-level file function.
FCLOSE( ) Function	Flush and close a file or communication port opened with a low-level file function.
FCREATE( ) Function	Create and open a low-level file.
FEOF( ) Function	Determine whether the file pointer is positioned at the end of a file.
FERROR( ) Function	Return a number corresponding to the most recent low-level file function error.
FFLUSH( ) Function	Flush to disk a file opened with a low-level function.
FGETS( ) Function	Return a series of bytes from a file or a communication port opened with a low-level file function until it encounters a carriage return.
FOPEN( ) Function	Open a file for use with low-level file functions.
FPUTS( ) Function	Write a character string, carriage return, and line feed to a file opened with a low-level file function.
FREAD( ) Function	Return a specified number of bytes from a file opened with a low-level function.
FSEEK( ) Function	Move the file pointer in a file opened with a low-level file function.
FWRITE( ) Function	Write a character string to a file opened with a low-level file function.
HEADER( ) Function	Return the number of bytes in the header of the current or specified table file.

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