Set the size of a file on disk
LOADLIB "wh::files.whlib"; MACRO SetDiskFilelength(INTEGER filehandle, INTEGER64 filesize)
ID of file, as returned by OpenDiskFile or CreateDiskFile
The new size for the file in bytes
Set the size of a file on disk, truncating or extending it as necessary. If the file pointer points outside the new file, it is moved to EOF, otherwise it is not moved. If a file is extended, the new bytes will be set to zero.