Changes the size of a file.

#define INCL_DOSFILEMGR
#include <os2.h>

HFILE     hFile;   /*  Handle of the file whose size to be changed. */
ULONG     cbSize;  /*  New size, in bytes, of the file. */
APIRET    ulrc;    /*  Return Code. */

ulrc = DosSetFileSize(hFile, cbSize);