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  Include:   DOS.INC
 
  Syntax:    @GetFileSize handle
 
  Summary:   Gets the file size by moving the file pointer to
             end-of-file
 
             NOTE: The file pointer is reset to zero. Thus this
                   macro should not be called during operations that move
                   the pointer.
 
  Argument:  <handle>     Previously opened file handle.
 
  Returns:   If carry: clear, file length in DX:AX
 
  Modifies:  AX, BX, CX, DX
 
  See also:  Int 21h Function 42h
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