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_FCreate( ) API Library Routine

  • Articolo

Assigns a Visual FoxPro channel to a new file.

FCHAN _FCreate(char FAR *filename, int mode)
char FAR *filename;         /* Name of file to create. */
int mode;                     /* File attributes. */

Remarks

If a file with the specified name already exists, _FCreate( ) truncates the existing file to zero bytes.

The mode parameter may be one or more of the following flags: FC_READONLY, FC_SYSTEM, FC_HIDDEN, and FC_TEMPORARY. You can combine these flags using the C | or + operator. An additional flag, FC_NORMAL, specifies that the file has none of the other attributes. FC_TEMPORARY files are automatically deleted when you call _FClose( ) to close the file.

_FCreate( ) returns the file channel if it succeeds in creating the file, or – 1 if it fails.

For more information on how to create an API library and integrate it with Visual FoxPro, see Accessing the Visual FoxPro API.

Example

The following example uses _FCreate( ) to create a number of files using the various mode flags of _FCreate( ).

Visual FoxPro Code

SET LIBRARY TO FCREATE

C Code

#include <pro_ext.h>

FAR Example(ParamBlk FAR *parm)
{
   FCHAN fchan;

   fchan = _FCreate("normal.tmp", FC_NORMAL);
   _FClose(fchan);

   fchan = _FCreate("readonly.tmp", FC_READONLY);
   _FClose(fchan);

   fchan = _FCreate("hidden.tmp", FC_HIDDEN);
   _FClose(fchan);

   fchan = _FCreate("system.tmp", FC_SYSTEM);
   _FClose(fchan);

   fchan = _FCreate("temp.tmp", FC_TEMPORARY);
   _FClose(fchan);

   fchan = _FCreate("multi.tmp", FC_SYSTEM | FC_READONLY);
   _FClose(fchan);
}

FoxInfo myFoxInfo[] = {
   {"FCREATE", (FPFI) Example, CALLONLOAD, ""},
};
FoxTable _FoxTable = {
   (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};

See Also

_FClose( ) API Library Routine | _FOpen( ) API Library Routine | Accessing the Visual FoxPro API