_FCHSize( ) API Library Routine


int _FCHSize(FCHAN chan, long length) FCHAN chan; /* File to change. / long length; / New length for the file in bytes. */

The specified length may extend or truncate the file. _FCHSize( ) returns 0 if it's successful in changing the length of 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.

The following example creates a file Temp.txt and sets its size to 8196 bytes using _FCHSize( ).

Visual FoxPro Code

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SET LIBRARY TO FCHSIZE DIR temp.txt

C Code

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#include <pro_ext.h> FAR Example(ParamBlk FAR parm) { FCHAN fchan = _FCreate("temp.txt", FC_NORMAL); _FCHSize(fchan, 8196); _FClose(fchan); } FoxInfo myFoxInfo[] = { {"FCHSIZE", (FPFI) Example, CALLONLOAD, ""}, }; FoxTable _FoxTable = { (FoxTable FAR ) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo };

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#include <pro_ext.h>
FAR Example(ParamBlk FAR *parm)
{
   FCHAN fchan = _FCreate("temp.txt", FC_NORMAL);
   _FCHSize(fchan, 8196);
   _FClose(fchan);
}
FoxInfo myFoxInfo[] = {
   {"FCHSIZE", (FPFI) Example, CALLONLOAD, ""},
};
FoxTable _FoxTable = {
   (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};

Reference

_FGets( ) API Library Routine
_FPuts( ) API Library Routine
_FWrite( ) API Library Routine

Other Resources

API Library Construction

Remarks

Example

Visual FoxPro Code

C Code

See Also

Reference

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