Open a text file for reading, or binary file for read/write System unit
1 procedure Reset(var FileHandle TextFile);
2 procedure Reset (var FileHandle File {RecordSize ;
The Reset procedure opens a file given by FileHandle for read, write or read and write access.
You must use AssignFile to assign a file to the FileHandle before using Reset.
Use Write or WriteLn to write to the file after this Reset is executed.
Version 1
Is used for text files. They can only be read after opening with Reset.
Version 2
Is for binary files. Before using Reset, you must set FileMode to one of the following:
fmOpenRead  : Read only
fmOpenWrite  : Write only
fmOpenReadWrite  : Read and write

The optional RecordSize value is used to override the default 128 byte record size for binary (untyped) files. For such files, only BlockRead and BlockWrite can be used.
Related commands
AppendOpen a text file to allow appending of text to the end
AssignFileAssigns a file handle to a binary or text file
CloseFileCloses an open file
FileDefines a typed or untyped file
ReWriteOpen a text or binary file for write access
TextFileDeclares a file type for storing lines of text
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Example code : Writing and reading lines of text to/from a text file
  myFile : TextFile;
  text   : string;

  // Try to open the Test.txt file for writing to
  AssignFile(myFile, 'Test.txt');

  // Write a couple of well known words to this file
  WriteLn(myFile, 'Hello');
  WriteLn(myFile, 'World');

  // Close the file

  // Reopen the file in read only mode
  FileMode := fmOpenRead;

  // Display the file contents
  while not Eof(myFile) do
    ReadLn(myFile, text);

  // Close the file for the last time
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