DosNewSize

This call changes the size of a file.

DosNewSize

(FileHandle, FileSize)

FileHandle (HFILE) - input

Handle of the file whose size is being changed.
FileSize (ULONG) - input
File's new size in bytes.
rc (USHORT) - return
Return code descriptions are:
• NO_ERROR 5
  ERROR_ACCESS_DENIED
  6
  ERROR_INVALID_HANDLE
  26
  ERROR_NOT_DOS_DISK
  33
  ERROR_LOCK_VIOLATION
  87
  ERROR_INVALID_PARAMETER
  112
  ERROR_DISK_FULL
  Remarks

  When DosNewSize is called, the file must be open in a mode that allows write access. If the file is a read-only file, its read-only status must be changed with DosSetFileMode before you can open the file for write access.

  The open file can be truncated or extended in size. If the file is being extended, the file system makes a reasonable attempt to allocate the additional bytes for the file in a contiguous (or nearly contiguous) space on the medium. The value of the new bytes is undefined.

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