How Do I Read A Text From The File In Vbscript?

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VBScript

Const ForReading = 1, ForWriting = 2, ForAppending = 8
Const TristateUseDefault = -2, TristateTrue = -1, TristateFalse = 0
Dim fso, MyFile, FileName, TextLine

Set fso = CreateObject("Scripting.FileSystemObject")


FileName = "D:\Users\sasemb\Desktop\read.txt"

Set MyFile = fso.OpenTextFile(FileName, ForReading,TristateFalse)

 MyFile.read(2)

WHY THIS SCRIPTING IS NOT READING THE CHARACTER??
WILL THIS READ SCRIPT GIVE AN OUTPUT THAT ITS READING THE FIRST 2 CHARCATERS??
BUT WHILE EXECUTING ITS RUNNING.

AND PLEASE TELL ME WHY DO WE USE TRI STATE TRUE AND TRISTATE FALSE

I,M AN BEGINEER,HELP ME