;Snippet 

#include <FileConstants.au3>
#include <File.au3>
Local $sData, $iMyInt, $sFileName , $hFileOpen 
$sData = "I have a problem. I want to put a 0 (a binary 0 NOT an ascii 30) at the front of this string, then save to a file"
$iMyInt = 0
$sData = $iMyInt & $sData
$sFileName = "C:\Atest1.bin"
$hFileOpen = FileOpen($sFileName, 1 + 16)
FileWrite($hFileOpen, $sData)
FileClose($hFileOpen)
MsgBox (0, "DONE!", "")

; The above does not work I get a 30 NOT the 0 (zero)that I want.

exit