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#include <FileConstants.au3>
#include <MsgBoxConstants.au3>
#include <WinAPIFiles.au3>
#include <String.au3>

    ; Open the file for reading and store the handle to a variable.
    Local $hFileOpen = FileOpen("log.txt")
    If $hFileOpen = -1 Then
        MsgBox($MB_SYSTEMMODAL, "", "An error occurred when reading the file.")
        Return False
    EndIf

    ; Read the contents of the file using the handle returned by FileOpen.
    Local $sFileRead = FileRead($hFileOpen)

    ; Close the handle returned by FileOpen.
    FileClose($hFileOpen)

    ; Display the contents of the file.
   ; MsgBox($MB_SYSTEMMODAL, "", $sFileRead)